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Finding the Fourth Proportional to 7,212.65, 10,818.97 and 3,932.15

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Solution

The fourth proportional to 7,212.65, 10,818.97 and 3,932.15 is: 5,898.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.65 : 10,818.97 = 3,932.15 : x
  2. Step 2: Convert to fraction form
    7,212.65/10,818.97 = 3,932.15/x
  3. Step 3: Cross multiply
    7,212.65x = 10,818.97 × 3,932.15
  4. Step 4: Simplify right side
    7,212.65x = 42,541,748.96
  5. Step 5: Solve for x
    x = 42,541,748.96/7,212.65
  6. Step 6: Final answer
    x = 5,898.22

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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.