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Finding the Fourth Proportional to 15,181.55, 20,946.97 and 9,213.08

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Solution

The fourth proportional to 15,181.55, 20,946.97 and 9,213.08 is: 12,711.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,181.55 : 20,946.97 = 9,213.08 : x
  2. Step 2: Convert to fraction form
    15,181.55/20,946.97 = 9,213.08/x
  3. Step 3: Cross multiply
    15,181.55x = 20,946.97 × 9,213.08
  4. Step 4: Simplify right side
    15,181.55x = 192,986,110.37
  5. Step 5: Solve for x
    x = 192,986,110.37/15,181.55
  6. Step 6: Final answer
    x = 12,711.88

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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.