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Finding the Fourth Proportional to 20,753.78, 28,630.78 and 12,250.12

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Solution

The fourth proportional to 20,753.78, 28,630.78 and 12,250.12 is: 16,899.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.78 : 28,630.78 = 12,250.12 : x
  2. Step 2: Convert to fraction form
    20,753.78/28,630.78 = 12,250.12/x
  3. Step 3: Cross multiply
    20,753.78x = 28,630.78 × 12,250.12
  4. Step 4: Simplify right side
    20,753.78x = 350,730,490.69
  5. Step 5: Solve for x
    x = 350,730,490.69/20,753.78
  6. Step 6: Final answer
    x = 16,899.60

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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.