Home / 20,531.16-28,148.28-20,157.48

Finding the Fourth Proportional to 20,531.16, 28,148.28 and 20,157.48

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Solution

The fourth proportional to 20,531.16, 28,148.28 and 20,157.48 is: 27,635.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.16 : 28,148.28 = 20,157.48 : x
  2. Step 2: Convert to fraction form
    20,531.16/28,148.28 = 20,157.48/x
  3. Step 3: Cross multiply
    20,531.16x = 28,148.28 × 20,157.48
  4. Step 4: Simplify right side
    20,531.16x = 567,398,391.13
  5. Step 5: Solve for x
    x = 567,398,391.13/20,531.16
  6. Step 6: Final answer
    x = 27,635.96

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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.