Home / 10,221.28-15,318.68-4,291.44

Finding the Fourth Proportional to 10,221.28, 15,318.68 and 4,291.44

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Solution

The fourth proportional to 10,221.28, 15,318.68 and 4,291.44 is: 6,431.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.28 : 15,318.68 = 4,291.44 : x
  2. Step 2: Convert to fraction form
    10,221.28/15,318.68 = 4,291.44/x
  3. Step 3: Cross multiply
    10,221.28x = 15,318.68 × 4,291.44
  4. Step 4: Simplify right side
    10,221.28x = 65,739,196.10
  5. Step 5: Solve for x
    x = 65,739,196.10/10,221.28
  6. Step 6: Final answer
    x = 6,431.60

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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.