Home / 38,689.92-58,031.10-12,387.60

Finding the Fourth Proportional to 38,689.92, 58,031.10 and 12,387.60

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Solution

The fourth proportional to 38,689.92, 58,031.10 and 12,387.60 is: 18,580.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,689.92 : 58,031.10 = 12,387.60 : x
  2. Step 2: Convert to fraction form
    38,689.92/58,031.10 = 12,387.60/x
  3. Step 3: Cross multiply
    38,689.92x = 58,031.10 × 12,387.60
  4. Step 4: Simplify right side
    38,689.92x = 718,866,054.36
  5. Step 5: Solve for x
    x = 718,866,054.36/38,689.92
  6. Step 6: Final answer
    x = 18,580.19

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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.