Home / 10,439.20-15,697.20-8,749.60

Finding the Fourth Proportional to 10,439.20, 15,697.20 and 8,749.60

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Solution

The fourth proportional to 10,439.20, 15,697.20 and 8,749.60 is: 13,156.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,439.20 : 15,697.20 = 8,749.60 : x
  2. Step 2: Convert to fraction form
    10,439.20/15,697.20 = 8,749.60/x
  3. Step 3: Cross multiply
    10,439.20x = 15,697.20 × 8,749.60
  4. Step 4: Simplify right side
    10,439.20x = 137,344,221.12
  5. Step 5: Solve for x
    x = 137,344,221.12/10,439.20
  6. Step 6: Final answer
    x = 13,156.58

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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.