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Finding the Fourth Proportional to 15,161.70, 20,924.69 and 8,448.42

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Solution

The fourth proportional to 15,161.70, 20,924.69 and 8,448.42 is: 11,659.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,161.70 : 20,924.69 = 8,448.42 : x
  2. Step 2: Convert to fraction form
    15,161.70/20,924.69 = 8,448.42/x
  3. Step 3: Cross multiply
    15,161.70x = 20,924.69 × 8,448.42
  4. Step 4: Simplify right side
    15,161.70x = 176,780,569.49
  5. Step 5: Solve for x
    x = 176,780,569.49/15,161.70
  6. Step 6: Final answer
    x = 11,659.68

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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.