Home / 14,269.40-19,691.76-7,981.78

Finding the Fourth Proportional to 14,269.40, 19,691.76 and 7,981.78

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Solution

The fourth proportional to 14,269.40, 19,691.76 and 7,981.78 is: 11,014.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,269.40 : 19,691.76 = 7,981.78 : x
  2. Step 2: Convert to fraction form
    14,269.40/19,691.76 = 7,981.78/x
  3. Step 3: Cross multiply
    14,269.40x = 19,691.76 × 7,981.78
  4. Step 4: Simplify right side
    14,269.40x = 157,175,296.13
  5. Step 5: Solve for x
    x = 157,175,296.13/14,269.40
  6. Step 6: Final answer
    x = 11,014.85

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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.