Home / 15,504.76-21,396.52-8,431.20

Finding the Fourth Proportional to 15,504.76, 21,396.52 and 8,431.20

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Solution

The fourth proportional to 15,504.76, 21,396.52 and 8,431.20 is: 11,635.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,504.76 : 21,396.52 = 8,431.20 : x
  2. Step 2: Convert to fraction form
    15,504.76/21,396.52 = 8,431.20/x
  3. Step 3: Cross multiply
    15,504.76x = 21,396.52 × 8,431.20
  4. Step 4: Simplify right side
    15,504.76x = 180,398,339.42
  5. Step 5: Solve for x
    x = 180,398,339.42/15,504.76
  6. Step 6: Final answer
    x = 11,635.03

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Half scale
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Double scale
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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.