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Finding the Fourth Proportional to 7,872.17, 10,875.53 and 5,879.29

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Solution

The fourth proportional to 7,872.17, 10,875.53 and 5,879.29 is: 8,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.17 : 10,875.53 = 5,879.29 : x
  2. Step 2: Convert to fraction form
    7,872.17/10,875.53 = 5,879.29/x
  3. Step 3: Cross multiply
    7,872.17x = 10,875.53 × 5,879.29
  4. Step 4: Simplify right side
    7,872.17x = 63,940,394.77
  5. Step 5: Solve for x
    x = 63,940,394.77/7,872.17
  6. Step 6: Final answer
    x = 8,122.33

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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.