Home / 15,430.47-21,294.20-8,357.05

Finding the Fourth Proportional to 15,430.47, 21,294.20 and 8,357.05

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Solution

The fourth proportional to 15,430.47, 21,294.20 and 8,357.05 is: 11,532.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.47 : 21,294.20 = 8,357.05 : x
  2. Step 2: Convert to fraction form
    15,430.47/21,294.20 = 8,357.05/x
  3. Step 3: Cross multiply
    15,430.47x = 21,294.20 × 8,357.05
  4. Step 4: Simplify right side
    15,430.47x = 177,956,694.11
  5. Step 5: Solve for x
    x = 177,956,694.11/15,430.47
  6. Step 6: Final answer
    x = 11,532.81

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Double scale
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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.