Home / 13,239.38-18,278.91-8,208.95

Finding the Fourth Proportional to 13,239.38, 18,278.91 and 8,208.95

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Solution

The fourth proportional to 13,239.38, 18,278.91 and 8,208.95 is: 11,333.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.38 : 18,278.91 = 8,208.95 : x
  2. Step 2: Convert to fraction form
    13,239.38/18,278.91 = 8,208.95/x
  3. Step 3: Cross multiply
    13,239.38x = 18,278.91 × 8,208.95
  4. Step 4: Simplify right side
    13,239.38x = 150,050,658.24
  5. Step 5: Solve for x
    x = 150,050,658.24/13,239.38
  6. Step 6: Final answer
    x = 11,333.66

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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.