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Finding the Fourth Proportional to 20,200.80, 27,877.01 and 11,248.40

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Solution

The fourth proportional to 20,200.80, 27,877.01 and 11,248.40 is: 15,522.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,200.80 : 27,877.01 = 11,248.40 : x
  2. Step 2: Convert to fraction form
    20,200.80/27,877.01 = 11,248.40/x
  3. Step 3: Cross multiply
    20,200.80x = 27,877.01 × 11,248.40
  4. Step 4: Simplify right side
    20,200.80x = 313,571,759.28
  5. Step 5: Solve for x
    x = 313,571,759.28/20,200.80
  6. Step 6: Final answer
    x = 15,522.74

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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.