Home / 10,621.60-15,932.40-5,372.80

Finding the Fourth Proportional to 10,621.60, 15,932.40 and 5,372.80

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Solution

The fourth proportional to 10,621.60, 15,932.40 and 5,372.80 is: 8,059.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,621.60 : 15,932.40 = 5,372.80 : x
  2. Step 2: Convert to fraction form
    10,621.60/15,932.40 = 5,372.80/x
  3. Step 3: Cross multiply
    10,621.60x = 15,932.40 × 5,372.80
  4. Step 4: Simplify right side
    10,621.60x = 85,601,598.72
  5. Step 5: Solve for x
    x = 85,601,598.72/10,621.60
  6. Step 6: Final answer
    x = 8,059.20

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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.