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Finding the Fourth Proportional to 38,398.65, 57,600.90 and 13,090.31

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Solution

The fourth proportional to 38,398.65, 57,600.90 and 13,090.31 is: 19,636.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,398.65 : 57,600.90 = 13,090.31 : x
  2. Step 2: Convert to fraction form
    38,398.65/57,600.90 = 13,090.31/x
  3. Step 3: Cross multiply
    38,398.65x = 57,600.90 × 13,090.31
  4. Step 4: Simplify right side
    38,398.65x = 754,013,349.27
  5. Step 5: Solve for x
    x = 754,013,349.27/38,398.65
  6. Step 6: Final answer
    x = 19,636.45

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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.