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Finding the Fourth Proportional to 7,998.65, 11,998.04 and 5,242.78

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Solution

The fourth proportional to 7,998.65, 11,998.04 and 5,242.78 is: 7,864.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.65 : 11,998.04 = 5,242.78 : x
  2. Step 2: Convert to fraction form
    7,998.65/11,998.04 = 5,242.78/x
  3. Step 3: Cross multiply
    7,998.65x = 11,998.04 × 5,242.78
  4. Step 4: Simplify right side
    7,998.65x = 62,903,073.27
  5. Step 5: Solve for x
    x = 62,903,073.27/7,998.65
  6. Step 6: Final answer
    x = 7,864.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.