Home / 20,728.16-28,604.95-11,776.15

Finding the Fourth Proportional to 20,728.16, 28,604.95 and 11,776.15

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Solution

The fourth proportional to 20,728.16, 28,604.95 and 11,776.15 is: 16,251.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.16 : 28,604.95 = 11,776.15 : x
  2. Step 2: Convert to fraction form
    20,728.16/28,604.95 = 11,776.15/x
  3. Step 3: Cross multiply
    20,728.16x = 28,604.95 × 11,776.15
  4. Step 4: Simplify right side
    20,728.16x = 336,856,160.91
  5. Step 5: Solve for x
    x = 336,856,160.91/20,728.16
  6. Step 6: Final answer
    x = 16,251.14

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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.