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Finding the Fourth Proportional to 57,720.48, 86,580.72 and 13,944.48

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Solution

The fourth proportional to 57,720.48, 86,580.72 and 13,944.48 is: 20,916.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,720.48 : 86,580.72 = 13,944.48 : x
  2. Step 2: Convert to fraction form
    57,720.48/86,580.72 = 13,944.48/x
  3. Step 3: Cross multiply
    57,720.48x = 86,580.72 × 13,944.48
  4. Step 4: Simplify right side
    57,720.48x = 1,207,323,118.43
  5. Step 5: Solve for x
    x = 1,207,323,118.43/57,720.48
  6. Step 6: Final answer
    x = 20,916.72

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.