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Finding the Fourth Proportional to 15,195.12, 20,972.52 and 8,908.80

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Solution

The fourth proportional to 15,195.12, 20,972.52 and 8,908.80 is: 12,296.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.12 : 20,972.52 = 8,908.80 : x
  2. Step 2: Convert to fraction form
    15,195.12/20,972.52 = 8,908.80/x
  3. Step 3: Cross multiply
    15,195.12x = 20,972.52 × 8,908.80
  4. Step 4: Simplify right side
    15,195.12x = 186,839,986.18
  5. Step 5: Solve for x
    x = 186,839,986.18/15,195.12
  6. Step 6: Final answer
    x = 12,296.05

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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.