Home / 12,591.07-18,872.77-5,191.49

Finding the Fourth Proportional to 12,591.07, 18,872.77 and 5,191.49

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Solution

The fourth proportional to 12,591.07, 18,872.77 and 5,191.49 is: 7,781.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.07 : 18,872.77 = 5,191.49 : x
  2. Step 2: Convert to fraction form
    12,591.07/18,872.77 = 5,191.49/x
  3. Step 3: Cross multiply
    12,591.07x = 18,872.77 × 5,191.49
  4. Step 4: Simplify right side
    12,591.07x = 97,977,855.27
  5. Step 5: Solve for x
    x = 97,977,855.27/12,591.07
  6. Step 6: Final answer
    x = 7,781.54

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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.