Home / 13,691.40-18,894.21-7,641.92

Finding the Fourth Proportional to 13,691.40, 18,894.21 and 7,641.92

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Solution

The fourth proportional to 13,691.40, 18,894.21 and 7,641.92 is: 10,545.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.40 : 18,894.21 = 7,641.92 : x
  2. Step 2: Convert to fraction form
    13,691.40/18,894.21 = 7,641.92/x
  3. Step 3: Cross multiply
    13,691.40x = 18,894.21 × 7,641.92
  4. Step 4: Simplify right side
    13,691.40x = 144,387,996.57
  5. Step 5: Solve for x
    x = 144,387,996.57/13,691.40
  6. Step 6: Final answer
    x = 10,545.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.