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Finding the Fourth Proportional to 11,869.80, 17,831.10 and 9,925.80

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Solution

The fourth proportional to 11,869.80, 17,831.10 and 9,925.80 is: 14,910.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,869.80 : 17,831.10 = 9,925.80 : x
  2. Step 2: Convert to fraction form
    11,869.80/17,831.10 = 9,925.80/x
  3. Step 3: Cross multiply
    11,869.80x = 17,831.10 × 9,925.80
  4. Step 4: Simplify right side
    11,869.80x = 176,987,932.38
  5. Step 5: Solve for x
    x = 176,987,932.38/11,869.80
  6. Step 6: Final answer
    x = 14,910.78

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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.