Home / 20,521.86-28,439.15-20,128.14

Finding the Fourth Proportional to 20,521.86, 28,439.15 and 20,128.14

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Solution

The fourth proportional to 20,521.86, 28,439.15 and 20,128.14 is: 27,893.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.86 : 28,439.15 = 20,128.14 : x
  2. Step 2: Convert to fraction form
    20,521.86/28,439.15 = 20,128.14/x
  3. Step 3: Cross multiply
    20,521.86x = 28,439.15 × 20,128.14
  4. Step 4: Simplify right side
    20,521.86x = 572,427,092.04
  5. Step 5: Solve for x
    x = 572,427,092.04/20,521.86
  6. Step 6: Final answer
    x = 27,893.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.