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Finding the Fourth Proportional to 15,021.30, 22,512.78 and 7,123.80

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Solution

The fourth proportional to 15,021.30, 22,512.78 and 7,123.80 is: 10,676.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.30 : 22,512.78 = 7,123.80 : x
  2. Step 2: Convert to fraction form
    15,021.30/22,512.78 = 7,123.80/x
  3. Step 3: Cross multiply
    15,021.30x = 22,512.78 × 7,123.80
  4. Step 4: Simplify right side
    15,021.30x = 160,376,542.16
  5. Step 5: Solve for x
    x = 160,376,542.16/15,021.30
  6. Step 6: Final answer
    x = 10,676.61

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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.