Home / 25,129.48-34,753.86-21,980.20

Finding the Fourth Proportional to 25,129.48, 34,753.86 and 21,980.20

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Solution

The fourth proportional to 25,129.48, 34,753.86 and 21,980.20 is: 30,398.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,129.48 : 34,753.86 = 21,980.20 : x
  2. Step 2: Convert to fraction form
    25,129.48/34,753.86 = 21,980.20/x
  3. Step 3: Cross multiply
    25,129.48x = 34,753.86 × 21,980.20
  4. Step 4: Simplify right side
    25,129.48x = 763,896,793.57
  5. Step 5: Solve for x
    x = 763,896,793.57/25,129.48
  6. Step 6: Final answer
    x = 30,398.43

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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.