Home / 20,618.97-28,456.14-12,551.97

Finding the Fourth Proportional to 20,618.97, 28,456.14 and 12,551.97

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Solution

The fourth proportional to 20,618.97, 28,456.14 and 12,551.97 is: 17,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.97 : 28,456.14 = 12,551.97 : x
  2. Step 2: Convert to fraction form
    20,618.97/28,456.14 = 12,551.97/x
  3. Step 3: Cross multiply
    20,618.97x = 28,456.14 × 12,551.97
  4. Step 4: Simplify right side
    20,618.97x = 357,180,615.60
  5. Step 5: Solve for x
    x = 357,180,615.60/20,618.97
  6. Step 6: Final answer
    x = 17,322.91

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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.