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Finding the Fourth Proportional to 20,143.52, 27,915.50 and 19,861.52

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Solution

The fourth proportional to 20,143.52, 27,915.50 and 19,861.52 is: 27,524.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.52 : 27,915.50 = 19,861.52 : x
  2. Step 2: Convert to fraction form
    20,143.52/27,915.50 = 19,861.52/x
  3. Step 3: Cross multiply
    20,143.52x = 27,915.50 × 19,861.52
  4. Step 4: Simplify right side
    20,143.52x = 554,444,261.56
  5. Step 5: Solve for x
    x = 554,444,261.56/20,143.52
  6. Step 6: Final answer
    x = 27,524.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.