Home / 15,153.50-20,911.68-8,438.73

Finding the Fourth Proportional to 15,153.50, 20,911.68 and 8,438.73

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Solution

The fourth proportional to 15,153.50, 20,911.68 and 8,438.73 is: 11,645.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.50 : 20,911.68 = 8,438.73 : x
  2. Step 2: Convert to fraction form
    15,153.50/20,911.68 = 8,438.73/x
  3. Step 3: Cross multiply
    15,153.50x = 20,911.68 × 8,438.73
  4. Step 4: Simplify right side
    15,153.50x = 176,468,021.37
  5. Step 5: Solve for x
    x = 176,468,021.37/15,153.50
  6. Step 6: Final answer
    x = 11,645.37

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Half scale
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Double scale
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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.