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Finding the Fourth Proportional to 5,329.70, 7,339.79 and 5,215.22

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Solution

The fourth proportional to 5,329.70, 7,339.79 and 5,215.22 is: 7,182.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,329.70 : 7,339.79 = 5,215.22 : x
  2. Step 2: Convert to fraction form
    5,329.70/7,339.79 = 5,215.22/x
  3. Step 3: Cross multiply
    5,329.70x = 7,339.79 × 5,215.22
  4. Step 4: Simplify right side
    5,329.70x = 38,278,593.53
  5. Step 5: Solve for x
    x = 38,278,593.53/5,329.70
  6. Step 6: Final answer
    x = 7,182.13

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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.