Home / 18,909.12-28,381.17-9,555.72

Finding the Fourth Proportional to 18,909.12, 28,381.17 and 9,555.72

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Solution

The fourth proportional to 18,909.12, 28,381.17 and 9,555.72 is: 14,342.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.12 : 28,381.17 = 9,555.72 : x
  2. Step 2: Convert to fraction form
    18,909.12/28,381.17 = 9,555.72/x
  3. Step 3: Cross multiply
    18,909.12x = 28,381.17 × 9,555.72
  4. Step 4: Simplify right side
    18,909.12x = 271,202,513.79
  5. Step 5: Solve for x
    x = 271,202,513.79/18,909.12
  6. Step 6: Final answer
    x = 14,342.42

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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.