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Finding the Fourth Proportional to 18,816.17, 25,966.17 and 10,318.05

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Solution

The fourth proportional to 18,816.17, 25,966.17 and 10,318.05 is: 14,238.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.17 : 25,966.17 = 10,318.05 : x
  2. Step 2: Convert to fraction form
    18,816.17/25,966.17 = 10,318.05/x
  3. Step 3: Cross multiply
    18,816.17x = 25,966.17 × 10,318.05
  4. Step 4: Simplify right side
    18,816.17x = 267,920,240.37
  5. Step 5: Solve for x
    x = 267,920,240.37/18,816.17
  6. Step 6: Final answer
    x = 14,238.83

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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.