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Finding the Fourth Proportional to 5,381.96, 7,411.03 and 4,989.92

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Solution

The fourth proportional to 5,381.96, 7,411.03 and 4,989.92 is: 6,871.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,381.96 : 7,411.03 = 4,989.92 : x
  2. Step 2: Convert to fraction form
    5,381.96/7,411.03 = 4,989.92/x
  3. Step 3: Cross multiply
    5,381.96x = 7,411.03 × 4,989.92
  4. Step 4: Simplify right side
    5,381.96x = 36,980,397.29
  5. Step 5: Solve for x
    x = 36,980,397.29/5,381.96
  6. Step 6: Final answer
    x = 6,871.18

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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.