Home / 20,720.38-28,569.01-16,122.48

Finding the Fourth Proportional to 20,720.38, 28,569.01 and 16,122.48

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Solution

The fourth proportional to 20,720.38, 28,569.01 and 16,122.48 is: 22,229.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.38 : 28,569.01 = 16,122.48 : x
  2. Step 2: Convert to fraction form
    20,720.38/28,569.01 = 16,122.48/x
  3. Step 3: Cross multiply
    20,720.38x = 28,569.01 × 16,122.48
  4. Step 4: Simplify right side
    20,720.38x = 460,603,149.50
  5. Step 5: Solve for x
    x = 460,603,149.50/20,720.38
  6. Step 6: Final answer
    x = 22,229.48

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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.