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Finding the Fourth Proportional to 5,252.76, 7,879.92 and 1,921.18

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Solution

The fourth proportional to 5,252.76, 7,879.92 and 1,921.18 is: 2,882.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,252.76 : 7,879.92 = 1,921.18 : x
  2. Step 2: Convert to fraction form
    5,252.76/7,879.92 = 1,921.18/x
  3. Step 3: Cross multiply
    5,252.76x = 7,879.92 × 1,921.18
  4. Step 4: Simplify right side
    5,252.76x = 15,138,744.71
  5. Step 5: Solve for x
    x = 15,138,744.71/5,252.76
  6. Step 6: Final answer
    x = 2,882.06

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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.