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Finding the Fourth Proportional to 7,642.79, 10,537.17 and 4,949.21

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Solution

The fourth proportional to 7,642.79, 10,537.17 and 4,949.21 is: 6,823.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,642.79 : 10,537.17 = 4,949.21 : x
  2. Step 2: Convert to fraction form
    7,642.79/10,537.17 = 4,949.21/x
  3. Step 3: Cross multiply
    7,642.79x = 10,537.17 × 4,949.21
  4. Step 4: Simplify right side
    7,642.79x = 52,150,614.45
  5. Step 5: Solve for x
    x = 52,150,614.45/7,642.79
  6. Step 6: Final answer
    x = 6,823.51

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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.