Home / 8,280.40-11,428.14-6,287.68

Finding the Fourth Proportional to 8,280.40, 11,428.14 and 6,287.68

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Solution

The fourth proportional to 8,280.40, 11,428.14 and 6,287.68 is: 8,677.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,280.40 : 11,428.14 = 6,287.68 : x
  2. Step 2: Convert to fraction form
    8,280.40/11,428.14 = 6,287.68/x
  3. Step 3: Cross multiply
    8,280.40x = 11,428.14 × 6,287.68
  4. Step 4: Simplify right side
    8,280.40x = 71,856,487.32
  5. Step 5: Solve for x
    x = 71,856,487.32/8,280.40
  6. Step 6: Final answer
    x = 8,677.90

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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.