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Finding the Fourth Proportional to 22,751.80, 31,397.16 and 12,680.62

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Solution

The fourth proportional to 22,751.80, 31,397.16 and 12,680.62 is: 17,499.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,751.80 : 31,397.16 = 12,680.62 : x
  2. Step 2: Convert to fraction form
    22,751.80/31,397.16 = 12,680.62/x
  3. Step 3: Cross multiply
    22,751.80x = 31,397.16 × 12,680.62
  4. Step 4: Simplify right side
    22,751.80x = 398,135,455.04
  5. Step 5: Solve for x
    x = 398,135,455.04/22,751.80
  6. Step 6: Final answer
    x = 17,499.08

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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.