Home / 21,217.55-29,279.07-11,785.50

Finding the Fourth Proportional to 21,217.55, 29,279.07 and 11,785.50

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Solution

The fourth proportional to 21,217.55, 29,279.07 and 11,785.50 is: 16,263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.55 : 29,279.07 = 11,785.50 : x
  2. Step 2: Convert to fraction form
    21,217.55/29,279.07 = 11,785.50/x
  3. Step 3: Cross multiply
    21,217.55x = 29,279.07 × 11,785.50
  4. Step 4: Simplify right side
    21,217.55x = 345,068,479.49
  5. Step 5: Solve for x
    x = 345,068,479.49/21,217.55
  6. Step 6: Final answer
    x = 16,263.36

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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.