Home / 20,708.20-28,570.03-13,542.31

Finding the Fourth Proportional to 20,708.20, 28,570.03 and 13,542.31

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Solution

The fourth proportional to 20,708.20, 28,570.03 and 13,542.31 is: 18,683.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,708.20 : 28,570.03 = 13,542.31 : x
  2. Step 2: Convert to fraction form
    20,708.20/28,570.03 = 13,542.31/x
  3. Step 3: Cross multiply
    20,708.20x = 28,570.03 × 13,542.31
  4. Step 4: Simplify right side
    20,708.20x = 386,904,202.97
  5. Step 5: Solve for x
    x = 386,904,202.97/20,708.20
  6. Step 6: Final answer
    x = 18,683.62

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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.