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Finding the Fourth Proportional to 9,981.81, 13,772.36 and 7,324.61

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Solution

The fourth proportional to 9,981.81, 13,772.36 and 7,324.61 is: 10,106.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,981.81 : 13,772.36 = 7,324.61 : x
  2. Step 2: Convert to fraction form
    9,981.81/13,772.36 = 7,324.61/x
  3. Step 3: Cross multiply
    9,981.81x = 13,772.36 × 7,324.61
  4. Step 4: Simplify right side
    9,981.81x = 100,877,115.23
  5. Step 5: Solve for x
    x = 100,877,115.23/9,981.81
  6. Step 6: Final answer
    x = 10,106.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.