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Finding the Fourth Proportional to 8,316.71, 12,480.05 and 3,318.20

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Solution

The fourth proportional to 8,316.71, 12,480.05 and 3,318.20 is: 4,979.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,316.71 : 12,480.05 = 3,318.20 : x
  2. Step 2: Convert to fraction form
    8,316.71/12,480.05 = 3,318.20/x
  3. Step 3: Cross multiply
    8,316.71x = 12,480.05 × 3,318.20
  4. Step 4: Simplify right side
    8,316.71x = 41,411,285.32
  5. Step 5: Solve for x
    x = 41,411,285.32/8,316.71
  6. Step 6: Final answer
    x = 4,979.29

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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.