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Finding the Fourth Proportional to 6,647.25, 9,892.40 and 6,425.78

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Solution

The fourth proportional to 6,647.25, 9,892.40 and 6,425.78 is: 9,562.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,647.25 : 9,892.40 = 6,425.78 : x
  2. Step 2: Convert to fraction form
    6,647.25/9,892.40 = 6,425.78/x
  3. Step 3: Cross multiply
    6,647.25x = 9,892.40 × 6,425.78
  4. Step 4: Simplify right side
    6,647.25x = 63,566,353.94
  5. Step 5: Solve for x
    x = 63,566,353.94/6,647.25
  6. Step 6: Final answer
    x = 9,562.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.