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Finding the Fourth Proportional to 7,951.62, 10,976.85 and 5,120.34

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Solution

The fourth proportional to 7,951.62, 10,976.85 and 5,120.34 is: 7,068.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.62 : 10,976.85 = 5,120.34 : x
  2. Step 2: Convert to fraction form
    7,951.62/10,976.85 = 5,120.34/x
  3. Step 3: Cross multiply
    7,951.62x = 10,976.85 × 5,120.34
  4. Step 4: Simplify right side
    7,951.62x = 56,205,204.13
  5. Step 5: Solve for x
    x = 56,205,204.13/7,951.62
  6. Step 6: Final answer
    x = 7,068.40

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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.