Home / 12,591.27-17,387.55-8,122.77

Finding the Fourth Proportional to 12,591.27, 17,387.55 and 8,122.77

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Solution

The fourth proportional to 12,591.27, 17,387.55 and 8,122.77 is: 11,216.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.27 : 17,387.55 = 8,122.77 : x
  2. Step 2: Convert to fraction form
    12,591.27/17,387.55 = 8,122.77/x
  3. Step 3: Cross multiply
    12,591.27x = 17,387.55 × 8,122.77
  4. Step 4: Simplify right side
    12,591.27x = 141,235,069.51
  5. Step 5: Solve for x
    x = 141,235,069.51/12,591.27
  6. Step 6: Final answer
    x = 11,216.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.