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Finding the Fourth Proportional to 7,672.79, 11,507.87 and 2,478.66

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Solution

The fourth proportional to 7,672.79, 11,507.87 and 2,478.66 is: 3,717.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,672.79 : 11,507.87 = 2,478.66 : x
  2. Step 2: Convert to fraction form
    7,672.79/11,507.87 = 2,478.66/x
  3. Step 3: Cross multiply
    7,672.79x = 11,507.87 × 2,478.66
  4. Step 4: Simplify right side
    7,672.79x = 28,524,084.66
  5. Step 5: Solve for x
    x = 28,524,084.66/7,672.79
  6. Step 6: Final answer
    x = 3,717.57

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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.