Home / 20,531.91-28,149.31-20,158.23

Finding the Fourth Proportional to 20,531.91, 28,149.31 and 20,158.23

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Solution

The fourth proportional to 20,531.91, 28,149.31 and 20,158.23 is: 27,636.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.91 : 28,149.31 = 20,158.23 : x
  2. Step 2: Convert to fraction form
    20,531.91/28,149.31 = 20,158.23/x
  3. Step 3: Cross multiply
    20,531.91x = 28,149.31 × 20,158.23
  4. Step 4: Simplify right side
    20,531.91x = 567,440,214.93
  5. Step 5: Solve for x
    x = 567,440,214.93/20,531.91
  6. Step 6: Final answer
    x = 27,636.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.