Home / 20,728.53-28,614.98-12,227.79

Finding the Fourth Proportional to 20,728.53, 28,614.98 and 12,227.79

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Solution

The fourth proportional to 20,728.53, 28,614.98 and 12,227.79 is: 16,880.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.53 : 28,614.98 = 12,227.79 : x
  2. Step 2: Convert to fraction form
    20,728.53/28,614.98 = 12,227.79/x
  3. Step 3: Cross multiply
    20,728.53x = 28,614.98 × 12,227.79
  4. Step 4: Simplify right side
    20,728.53x = 349,897,966.29
  5. Step 5: Solve for x
    x = 349,897,966.29/20,728.53
  6. Step 6: Final answer
    x = 16,880.02

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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.