Home / 11,443.12-15,791.40-6,407.80

Finding the Fourth Proportional to 11,443.12, 15,791.40 and 6,407.80

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Solution

The fourth proportional to 11,443.12, 15,791.40 and 6,407.80 is: 8,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,443.12 : 15,791.40 = 6,407.80 : x
  2. Step 2: Convert to fraction form
    11,443.12/15,791.40 = 6,407.80/x
  3. Step 3: Cross multiply
    11,443.12x = 15,791.40 × 6,407.80
  4. Step 4: Simplify right side
    11,443.12x = 101,188,132.92
  5. Step 5: Solve for x
    x = 101,188,132.92/11,443.12
  6. Step 6: Final answer
    x = 8,842.70

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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.