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Finding the Fourth Proportional to 15,144.70, 20,902.70 and 8,772.34

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Solution

The fourth proportional to 15,144.70, 20,902.70 and 8,772.34 is: 12,107.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.70 : 20,902.70 = 8,772.34 : x
  2. Step 2: Convert to fraction form
    15,144.70/20,902.70 = 8,772.34/x
  3. Step 3: Cross multiply
    15,144.70x = 20,902.70 × 8,772.34
  4. Step 4: Simplify right side
    15,144.70x = 183,365,591.32
  5. Step 5: Solve for x
    x = 183,365,591.32/15,144.70
  6. Step 6: Final answer
    x = 12,107.58

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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.