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Finding the Fourth Proportional to 7,961.16, 10,990.98 and 5,317.32

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Solution

The fourth proportional to 7,961.16, 10,990.98 and 5,317.32 is: 7,340.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.16 : 10,990.98 = 5,317.32 : x
  2. Step 2: Convert to fraction form
    7,961.16/10,990.98 = 5,317.32/x
  3. Step 3: Cross multiply
    7,961.16x = 10,990.98 × 5,317.32
  4. Step 4: Simplify right side
    7,961.16x = 58,442,557.77
  5. Step 5: Solve for x
    x = 58,442,557.77/7,961.16
  6. Step 6: Final answer
    x = 7,340.96

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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.