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Finding the Fourth Proportional to 7,902.92, 10,921.65 and 6,484.34

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Solution

The fourth proportional to 7,902.92, 10,921.65 and 6,484.34 is: 8,961.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,902.92 : 10,921.65 = 6,484.34 : x
  2. Step 2: Convert to fraction form
    7,902.92/10,921.65 = 6,484.34/x
  3. Step 3: Cross multiply
    7,902.92x = 10,921.65 × 6,484.34
  4. Step 4: Simplify right side
    7,902.92x = 70,819,691.96
  5. Step 5: Solve for x
    x = 70,819,691.96/7,902.92
  6. Step 6: Final answer
    x = 8,961.21

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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.