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Finding the Fourth Proportional to 18,725.68, 28,079.28 and 9,958.24

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Solution

The fourth proportional to 18,725.68, 28,079.28 and 9,958.24 is: 14,932.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,725.68 : 28,079.28 = 9,958.24 : x
  2. Step 2: Convert to fraction form
    18,725.68/28,079.28 = 9,958.24/x
  3. Step 3: Cross multiply
    18,725.68x = 28,079.28 × 9,958.24
  4. Step 4: Simplify right side
    18,725.68x = 279,620,209.27
  5. Step 5: Solve for x
    x = 279,620,209.27/18,725.68
  6. Step 6: Final answer
    x = 14,932.45

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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.