Home / 20,331.17-28,053.67-12,772.15

Finding the Fourth Proportional to 20,331.17, 28,053.67 and 12,772.15

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Solution

The fourth proportional to 20,331.17, 28,053.67 and 12,772.15 is: 17,623.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.17 : 28,053.67 = 12,772.15 : x
  2. Step 2: Convert to fraction form
    20,331.17/28,053.67 = 12,772.15/x
  3. Step 3: Cross multiply
    20,331.17x = 28,053.67 × 12,772.15
  4. Step 4: Simplify right side
    20,331.17x = 358,305,540.95
  5. Step 5: Solve for x
    x = 358,305,540.95/20,331.17
  6. Step 6: Final answer
    x = 17,623.46

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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.