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Finding the Fourth Proportional to 7,438.76, 11,160.02 and 5,251.76

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Solution

The fourth proportional to 7,438.76, 11,160.02 and 5,251.76 is: 7,878.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,438.76 : 11,160.02 = 5,251.76 : x
  2. Step 2: Convert to fraction form
    7,438.76/11,160.02 = 5,251.76/x
  3. Step 3: Cross multiply
    7,438.76x = 11,160.02 × 5,251.76
  4. Step 4: Simplify right side
    7,438.76x = 58,609,746.64
  5. Step 5: Solve for x
    x = 58,609,746.64/7,438.76
  6. Step 6: Final answer
    x = 7,878.97

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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.