Home / 12,505.80-18,758.67-5,108.61

Finding the Fourth Proportional to 12,505.80, 18,758.67 and 5,108.61

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Solution

The fourth proportional to 12,505.80, 18,758.67 and 5,108.61 is: 7,662.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,505.80 : 18,758.67 = 5,108.61 : x
  2. Step 2: Convert to fraction form
    12,505.80/18,758.67 = 5,108.61/x
  3. Step 3: Cross multiply
    12,505.80x = 18,758.67 × 5,108.61
  4. Step 4: Simplify right side
    12,505.80x = 95,830,729.15
  5. Step 5: Solve for x
    x = 95,830,729.15/12,505.80
  6. Step 6: Final answer
    x = 7,662.90

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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.