Home / 8,742.40-13,115.20-3,548.80

Finding the Fourth Proportional to 8,742.40, 13,115.20 and 3,548.80

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Solution

The fourth proportional to 8,742.40, 13,115.20 and 3,548.80 is: 5,323.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,742.40 : 13,115.20 = 3,548.80 : x
  2. Step 2: Convert to fraction form
    8,742.40/13,115.20 = 3,548.80/x
  3. Step 3: Cross multiply
    8,742.40x = 13,115.20 × 3,548.80
  4. Step 4: Simplify right side
    8,742.40x = 46,543,221.76
  5. Step 5: Solve for x
    x = 46,543,221.76/8,742.40
  6. Step 6: Final answer
    x = 5,323.85

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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.