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Finding the Fourth Proportional to 19,883.70, 27,439.13 and 10,931.12

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Solution

The fourth proportional to 19,883.70, 27,439.13 and 10,931.12 is: 15,084.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,883.70 : 27,439.13 = 10,931.12 : x
  2. Step 2: Convert to fraction form
    19,883.70/27,439.13 = 10,931.12/x
  3. Step 3: Cross multiply
    19,883.70x = 27,439.13 × 10,931.12
  4. Step 4: Simplify right side
    19,883.70x = 299,940,230.87
  5. Step 5: Solve for x
    x = 299,940,230.87/19,883.70
  6. Step 6: Final answer
    x = 15,084.73

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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.