Home / 13,087.20-18,064.98-7,781.99

Finding the Fourth Proportional to 13,087.20, 18,064.98 and 7,781.99

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Solution

The fourth proportional to 13,087.20, 18,064.98 and 7,781.99 is: 10,741.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,087.20 : 18,064.98 = 7,781.99 : x
  2. Step 2: Convert to fraction form
    13,087.20/18,064.98 = 7,781.99/x
  3. Step 3: Cross multiply
    13,087.20x = 18,064.98 × 7,781.99
  4. Step 4: Simplify right side
    13,087.20x = 140,581,454.80
  5. Step 5: Solve for x
    x = 140,581,454.80/13,087.20
  6. Step 6: Final answer
    x = 10,741.90

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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.