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Finding the Fourth Proportional to 12,470.84, 18,706.27 and 8,318.96

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Solution

The fourth proportional to 12,470.84, 18,706.27 and 8,318.96 is: 12,478.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,470.84 : 18,706.27 = 8,318.96 : x
  2. Step 2: Convert to fraction form
    12,470.84/18,706.27 = 8,318.96/x
  3. Step 3: Cross multiply
    12,470.84x = 18,706.27 × 8,318.96
  4. Step 4: Simplify right side
    12,470.84x = 155,616,788.52
  5. Step 5: Solve for x
    x = 155,616,788.52/12,470.84
  6. Step 6: Final answer
    x = 12,478.45

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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.