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Finding the Fourth Proportional to 38,430.72, 57,646.08 and 10,728

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Solution

The fourth proportional to 38,430.72, 57,646.08 and 10,728 is: 16,092

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,430.72 : 57,646.08 = 10,728 : x
  2. Step 2: Convert to fraction form
    38,430.72/57,646.08 = 10,728/x
  3. Step 3: Cross multiply
    38,430.72x = 57,646.08 × 10,728
  4. Step 4: Simplify right side
    38,430.72x = 618,427,146.24
  5. Step 5: Solve for x
    x = 618,427,146.24/38,430.72
  6. Step 6: Final answer
    x = 16,092

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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.