Home / 12,147.58-18,180.22-7,470.55

Finding the Fourth Proportional to 12,147.58, 18,180.22 and 7,470.55

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Solution

The fourth proportional to 12,147.58, 18,180.22 and 7,470.55 is: 11,180.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.58 : 18,180.22 = 7,470.55 : x
  2. Step 2: Convert to fraction form
    12,147.58/18,180.22 = 7,470.55/x
  3. Step 3: Cross multiply
    12,147.58x = 18,180.22 × 7,470.55
  4. Step 4: Simplify right side
    12,147.58x = 135,816,242.52
  5. Step 5: Solve for x
    x = 135,816,242.52/12,147.58
  6. Step 6: Final answer
    x = 11,180.52

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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.