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Finding the Fourth Proportional to 9,015.65, 12,429.08 and 7,769.97

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Solution

The fourth proportional to 9,015.65, 12,429.08 and 7,769.97 is: 10,711.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,015.65 : 12,429.08 = 7,769.97 : x
  2. Step 2: Convert to fraction form
    9,015.65/12,429.08 = 7,769.97/x
  3. Step 3: Cross multiply
    9,015.65x = 12,429.08 × 7,769.97
  4. Step 4: Simplify right side
    9,015.65x = 96,573,612.72
  5. Step 5: Solve for x
    x = 96,573,612.72/9,015.65
  6. Step 6: Final answer
    x = 10,711.78

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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.