Home / 21,520.16-29,694.60-12,086.90

Finding the Fourth Proportional to 21,520.16, 29,694.60 and 12,086.90

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Solution

The fourth proportional to 21,520.16, 29,694.60 and 12,086.90 is: 16,678.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.16 : 29,694.60 = 12,086.90 : x
  2. Step 2: Convert to fraction form
    21,520.16/29,694.60 = 12,086.90/x
  3. Step 3: Cross multiply
    21,520.16x = 29,694.60 × 12,086.90
  4. Step 4: Simplify right side
    21,520.16x = 358,915,660.74
  5. Step 5: Solve for x
    x = 358,915,660.74/21,520.16
  6. Step 6: Final answer
    x = 16,678.11

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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.