Home / 13,317.15-18,379.13-8,542.20

Finding the Fourth Proportional to 13,317.15, 18,379.13 and 8,542.20

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Solution

The fourth proportional to 13,317.15, 18,379.13 and 8,542.20 is: 11,789.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,317.15 : 18,379.13 = 8,542.20 : x
  2. Step 2: Convert to fraction form
    13,317.15/18,379.13 = 8,542.20/x
  3. Step 3: Cross multiply
    13,317.15x = 18,379.13 × 8,542.20
  4. Step 4: Simplify right side
    13,317.15x = 156,998,161.58
  5. Step 5: Solve for x
    x = 156,998,161.58/13,317.15
  6. Step 6: Final answer
    x = 11,789.17

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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.