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Finding the Fourth Proportional to 7,876.11, 11,812.53 and 3,490.77

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Solution

The fourth proportional to 7,876.11, 11,812.53 and 3,490.77 is: 5,235.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.11 : 11,812.53 = 3,490.77 : x
  2. Step 2: Convert to fraction form
    7,876.11/11,812.53 = 3,490.77/x
  3. Step 3: Cross multiply
    7,876.11x = 11,812.53 × 3,490.77
  4. Step 4: Simplify right side
    7,876.11x = 41,234,825.35
  5. Step 5: Solve for x
    x = 41,234,825.35/7,876.11
  6. Step 6: Final answer
    x = 5,235.43

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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.