Home / 8,126.40-12,160.80-5,649.60

Finding the Fourth Proportional to 8,126.40, 12,160.80 and 5,649.60

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Solution

The fourth proportional to 8,126.40, 12,160.80 and 5,649.60 is: 8,454.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,126.40 : 12,160.80 = 5,649.60 : x
  2. Step 2: Convert to fraction form
    8,126.40/12,160.80 = 5,649.60/x
  3. Step 3: Cross multiply
    8,126.40x = 12,160.80 × 5,649.60
  4. Step 4: Simplify right side
    8,126.40x = 68,703,655.68
  5. Step 5: Solve for x
    x = 68,703,655.68/8,126.40
  6. Step 6: Final answer
    x = 8,454.38

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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.