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Finding the Fourth Proportional to 7,812.54, 11,720.79 and 2,882.16

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Solution

The fourth proportional to 7,812.54, 11,720.79 and 2,882.16 is: 4,323.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,812.54 : 11,720.79 = 2,882.16 : x
  2. Step 2: Convert to fraction form
    7,812.54/11,720.79 = 2,882.16/x
  3. Step 3: Cross multiply
    7,812.54x = 11,720.79 × 2,882.16
  4. Step 4: Simplify right side
    7,812.54x = 33,781,192.11
  5. Step 5: Solve for x
    x = 33,781,192.11/7,812.54
  6. Step 6: Final answer
    x = 4,323.97

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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.