Home / 15,504.76-21,396.68-8,431.21

Finding the Fourth Proportional to 15,504.76, 21,396.68 and 8,431.21

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Solution

The fourth proportional to 15,504.76, 21,396.68 and 8,431.21 is: 11,635.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.76 : 21,396.68 = 8,431.21 : x
  2. Step 2: Convert to fraction form
    15,504.76/21,396.68 = 8,431.21/x
  3. Step 3: Cross multiply
    15,504.76x = 21,396.68 × 8,431.21
  4. Step 4: Simplify right side
    15,504.76x = 180,399,902.38
  5. Step 5: Solve for x
    x = 180,399,902.38/15,504.76
  6. Step 6: Final answer
    x = 11,635.13

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Find fourth proportional to 7,752.38, 10,698.34 and 4,215.61
Half scale
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Double scale
Find fourth proportional to 15,505.76, 21,398.06 and 8,432.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.