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Finding the Fourth Proportional to 7,910, 10,914.72 and 4,372.28

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Solution

The fourth proportional to 7,910, 10,914.72 and 4,372.28 is: 6,033.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910 : 10,914.72 = 4,372.28 : x
  2. Step 2: Convert to fraction form
    7,910/10,914.72 = 4,372.28/x
  3. Step 3: Cross multiply
    7,910x = 10,914.72 × 4,372.28
  4. Step 4: Simplify right side
    7,910x = 47,722,211.96
  5. Step 5: Solve for x
    x = 47,722,211.96/7,910
  6. Step 6: Final answer
    x = 6,033.15

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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.