Home / 18,731.40-28,097.10-9,961.80

Finding the Fourth Proportional to 18,731.40, 28,097.10 and 9,961.80

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Solution

The fourth proportional to 18,731.40, 28,097.10 and 9,961.80 is: 14,942.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,731.40 : 28,097.10 = 9,961.80 : x
  2. Step 2: Convert to fraction form
    18,731.40/28,097.10 = 9,961.80/x
  3. Step 3: Cross multiply
    18,731.40x = 28,097.10 × 9,961.80
  4. Step 4: Simplify right side
    18,731.40x = 279,897,690.78
  5. Step 5: Solve for x
    x = 279,897,690.78/18,731.40
  6. Step 6: Final answer
    x = 14,942.70

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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.