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Finding the Fourth Proportional to 15,145.52, 20,902.20 and 8,858.84

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Solution

The fourth proportional to 15,145.52, 20,902.20 and 8,858.84 is: 12,226.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.52 : 20,902.20 = 8,858.84 : x
  2. Step 2: Convert to fraction form
    15,145.52/20,902.20 = 8,858.84/x
  3. Step 3: Cross multiply
    15,145.52x = 20,902.20 × 8,858.84
  4. Step 4: Simplify right side
    15,145.52x = 185,169,245.45
  5. Step 5: Solve for x
    x = 185,169,245.45/15,145.52
  6. Step 6: Final answer
    x = 12,226.01

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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.