Home / 21,269.17-29,357.91-12,318.87

Finding the Fourth Proportional to 21,269.17, 29,357.91 and 12,318.87

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Solution

The fourth proportional to 21,269.17, 29,357.91 and 12,318.87 is: 17,003.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.17 : 29,357.91 = 12,318.87 : x
  2. Step 2: Convert to fraction form
    21,269.17/29,357.91 = 12,318.87/x
  3. Step 3: Cross multiply
    21,269.17x = 29,357.91 × 12,318.87
  4. Step 4: Simplify right side
    21,269.17x = 361,656,276.76
  5. Step 5: Solve for x
    x = 361,656,276.76/21,269.17
  6. Step 6: Final answer
    x = 17,003.78

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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.