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Finding the Fourth Proportional to 12,480.86, 18,708.17 and 4,981.47

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Solution

The fourth proportional to 12,480.86, 18,708.17 and 4,981.47 is: 7,466.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.86 : 18,708.17 = 4,981.47 : x
  2. Step 2: Convert to fraction form
    12,480.86/18,708.17 = 4,981.47/x
  3. Step 3: Cross multiply
    12,480.86x = 18,708.17 × 4,981.47
  4. Step 4: Simplify right side
    12,480.86x = 93,194,162.70
  5. Step 5: Solve for x
    x = 93,194,162.70/12,480.86
  6. Step 6: Final answer
    x = 7,466.97

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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.