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Finding the Fourth Proportional to 15,108.53, 20,849.40 and 8,820.90

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Solution

The fourth proportional to 15,108.53, 20,849.40 and 8,820.90 is: 12,172.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.53 : 20,849.40 = 8,820.90 : x
  2. Step 2: Convert to fraction form
    15,108.53/20,849.40 = 8,820.90/x
  3. Step 3: Cross multiply
    15,108.53x = 20,849.40 × 8,820.90
  4. Step 4: Simplify right side
    15,108.53x = 183,910,472.46
  5. Step 5: Solve for x
    x = 183,910,472.46/15,108.53
  6. Step 6: Final answer
    x = 12,172.63

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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.