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Finding the Fourth Proportional to 15,134.80, 20,891.44 and 8,764.24

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Solution

The fourth proportional to 15,134.80, 20,891.44 and 8,764.24 is: 12,097.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,134.80 : 20,891.44 = 8,764.24 : x
  2. Step 2: Convert to fraction form
    15,134.80/20,891.44 = 8,764.24/x
  3. Step 3: Cross multiply
    15,134.80x = 20,891.44 × 8,764.24
  4. Step 4: Simplify right side
    15,134.80x = 183,097,594.11
  5. Step 5: Solve for x
    x = 183,097,594.11/15,134.80
  6. Step 6: Final answer
    x = 12,097.79

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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.