Home / 7,129.60-10,687.20-3,236.80

Finding the Fourth Proportional to 7,129.60, 10,687.20 and 3,236.80

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Solution

The fourth proportional to 7,129.60, 10,687.20 and 3,236.80 is: 4,851.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.60 : 10,687.20 = 3,236.80 : x
  2. Step 2: Convert to fraction form
    7,129.60/10,687.20 = 3,236.80/x
  3. Step 3: Cross multiply
    7,129.60x = 10,687.20 × 3,236.80
  4. Step 4: Simplify right side
    7,129.60x = 34,592,328.96
  5. Step 5: Solve for x
    x = 34,592,328.96/7,129.60
  6. Step 6: Final answer
    x = 4,851.93

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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.