Home / 11,425.60-17,138.40-7,028.80

Finding the Fourth Proportional to 11,425.60, 17,138.40 and 7,028.80

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Solution

The fourth proportional to 11,425.60, 17,138.40 and 7,028.80 is: 10,543.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,425.60 : 17,138.40 = 7,028.80 : x
  2. Step 2: Convert to fraction form
    11,425.60/17,138.40 = 7,028.80/x
  3. Step 3: Cross multiply
    11,425.60x = 17,138.40 × 7,028.80
  4. Step 4: Simplify right side
    11,425.60x = 120,462,385.92
  5. Step 5: Solve for x
    x = 120,462,385.92/11,425.60
  6. Step 6: Final answer
    x = 10,543.20

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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.