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Finding the Fourth Proportional to 15,035.62, 20,749.20 and 8,321.71

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Solution

The fourth proportional to 15,035.62, 20,749.20 and 8,321.71 is: 11,483.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,035.62 : 20,749.20 = 8,321.71 : x
  2. Step 2: Convert to fraction form
    15,035.62/20,749.20 = 8,321.71/x
  3. Step 3: Cross multiply
    15,035.62x = 20,749.20 × 8,321.71
  4. Step 4: Simplify right side
    15,035.62x = 172,668,825.13
  5. Step 5: Solve for x
    x = 172,668,825.13/15,035.62
  6. Step 6: Final answer
    x = 11,483.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.