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Finding the Fourth Proportional to 12,612.85, 18,882.54 and 9,831.04

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Solution

The fourth proportional to 12,612.85, 18,882.54 and 9,831.04 is: 14,717.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,612.85 : 18,882.54 = 9,831.04 : x
  2. Step 2: Convert to fraction form
    12,612.85/18,882.54 = 9,831.04/x
  3. Step 3: Cross multiply
    12,612.85x = 18,882.54 × 9,831.04
  4. Step 4: Simplify right side
    12,612.85x = 185,635,006.04
  5. Step 5: Solve for x
    x = 185,635,006.04/12,612.85
  6. Step 6: Final answer
    x = 14,717.93

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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.