Home / 38,691.90-58,029.63-12,389.58

Finding the Fourth Proportional to 38,691.90, 58,029.63 and 12,389.58

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Solution

The fourth proportional to 38,691.90, 58,029.63 and 12,389.58 is: 18,581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,691.90 : 58,029.63 = 12,389.58 : x
  2. Step 2: Convert to fraction form
    38,691.90/58,029.63 = 12,389.58/x
  3. Step 3: Cross multiply
    38,691.90x = 58,029.63 × 12,389.58
  4. Step 4: Simplify right side
    38,691.90x = 718,962,743.26
  5. Step 5: Solve for x
    x = 718,962,743.26/38,691.90
  6. Step 6: Final answer
    x = 18,581.74

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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.