Home / 21,515.36-29,691.20-12,086.96

Finding the Fourth Proportional to 21,515.36, 29,691.20 and 12,086.96

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Solution

The fourth proportional to 21,515.36, 29,691.20 and 12,086.96 is: 16,680.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.36 : 29,691.20 = 12,086.96 : x
  2. Step 2: Convert to fraction form
    21,515.36/29,691.20 = 12,086.96/x
  3. Step 3: Cross multiply
    21,515.36x = 29,691.20 × 12,086.96
  4. Step 4: Simplify right side
    21,515.36x = 358,876,346.75
  5. Step 5: Solve for x
    x = 358,876,346.75/21,515.36
  6. Step 6: Final answer
    x = 16,680.01

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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.