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Finding the Fourth Proportional to 15,192.56, 20,961.78 and 8,901.56

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Solution

The fourth proportional to 15,192.56, 20,961.78 and 8,901.56 is: 12,281.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,192.56 : 20,961.78 = 8,901.56 : x
  2. Step 2: Convert to fraction form
    15,192.56/20,961.78 = 8,901.56/x
  3. Step 3: Cross multiply
    15,192.56x = 20,961.78 × 8,901.56
  4. Step 4: Simplify right side
    15,192.56x = 186,592,542.38
  5. Step 5: Solve for x
    x = 186,592,542.38/15,192.56
  6. Step 6: Final answer
    x = 12,281.84

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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.