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Finding the Fourth Proportional to 8,398.38, 12,562.90 and 6,900.80

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Solution

The fourth proportional to 8,398.38, 12,562.90 and 6,900.80 is: 10,322.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.38 : 12,562.90 = 6,900.80 : x
  2. Step 2: Convert to fraction form
    8,398.38/12,562.90 = 6,900.80/x
  3. Step 3: Cross multiply
    8,398.38x = 12,562.90 × 6,900.80
  4. Step 4: Simplify right side
    8,398.38x = 86,693,980.25
  5. Step 5: Solve for x
    x = 86,693,980.25/8,398.38
  6. Step 6: Final answer
    x = 10,322.70

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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.