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Finding the Fourth Proportional to 7,920.72, 11,881.08 and 2,077.32

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Solution

The fourth proportional to 7,920.72, 11,881.08 and 2,077.32 is: 3,115.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.72 : 11,881.08 = 2,077.32 : x
  2. Step 2: Convert to fraction form
    7,920.72/11,881.08 = 2,077.32/x
  3. Step 3: Cross multiply
    7,920.72x = 11,881.08 × 2,077.32
  4. Step 4: Simplify right side
    7,920.72x = 24,680,805.11
  5. Step 5: Solve for x
    x = 24,680,805.11/7,920.72
  6. Step 6: Final answer
    x = 3,115.98

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.