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Finding the Fourth Proportional to 7,871.48, 10,861.68 and 4,334.48

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Solution

The fourth proportional to 7,871.48, 10,861.68 and 4,334.48 is: 5,981.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,871.48 : 10,861.68 = 4,334.48 : x
  2. Step 2: Convert to fraction form
    7,871.48/10,861.68 = 4,334.48/x
  3. Step 3: Cross multiply
    7,871.48x = 10,861.68 × 4,334.48
  4. Step 4: Simplify right side
    7,871.48x = 47,079,734.73
  5. Step 5: Solve for x
    x = 47,079,734.73/7,871.48
  6. Step 6: Final answer
    x = 5,981.05

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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.