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Finding the Fourth Proportional to 10,155.84, 15,221.58 and 5,227.80

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Solution

The fourth proportional to 10,155.84, 15,221.58 and 5,227.80 is: 7,835.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,155.84 : 15,221.58 = 5,227.80 : x
  2. Step 2: Convert to fraction form
    10,155.84/15,221.58 = 5,227.80/x
  3. Step 3: Cross multiply
    10,155.84x = 15,221.58 × 5,227.80
  4. Step 4: Simplify right side
    10,155.84x = 79,575,375.92
  5. Step 5: Solve for x
    x = 79,575,375.92/10,155.84
  6. Step 6: Final answer
    x = 7,835.43

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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.