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Finding the Fourth Proportional to 20,425.55, 30,642.69 and 7,098.97

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Solution

The fourth proportional to 20,425.55, 30,642.69 and 7,098.97 is: 10,649.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.55 : 30,642.69 = 7,098.97 : x
  2. Step 2: Convert to fraction form
    20,425.55/30,642.69 = 7,098.97/x
  3. Step 3: Cross multiply
    20,425.55x = 30,642.69 × 7,098.97
  4. Step 4: Simplify right side
    20,425.55x = 217,531,537.03
  5. Step 5: Solve for x
    x = 217,531,537.03/20,425.55
  6. Step 6: Final answer
    x = 10,649.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.