Home / 12,591.03-18,869.99-5,191.38

Finding the Fourth Proportional to 12,591.03, 18,869.99 and 5,191.38

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Solution

The fourth proportional to 12,591.03, 18,869.99 and 5,191.38 is: 7,780.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.03 : 18,869.99 = 5,191.38 : x
  2. Step 2: Convert to fraction form
    12,591.03/18,869.99 = 5,191.38/x
  3. Step 3: Cross multiply
    12,591.03x = 18,869.99 × 5,191.38
  4. Step 4: Simplify right side
    12,591.03x = 97,961,262.73
  5. Step 5: Solve for x
    x = 97,961,262.73/12,591.03
  6. Step 6: Final answer
    x = 7,780.24

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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.