Home / 21,217.42-29,279.28-11,785.78

Finding the Fourth Proportional to 21,217.42, 29,279.28 and 11,785.78

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Solution

The fourth proportional to 21,217.42, 29,279.28 and 11,785.78 is: 16,263.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.42 : 29,279.28 = 11,785.78 : x
  2. Step 2: Convert to fraction form
    21,217.42/29,279.28 = 11,785.78/x
  3. Step 3: Cross multiply
    21,217.42x = 29,279.28 × 11,785.78
  4. Step 4: Simplify right side
    21,217.42x = 345,079,152.64
  5. Step 5: Solve for x
    x = 345,079,152.64/21,217.42
  6. Step 6: Final answer
    x = 16,263.95

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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.