Home / 7,117.29-9,821.99-3,930.75

Finding the Fourth Proportional to 7,117.29, 9,821.99 and 3,930.75

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Solution

The fourth proportional to 7,117.29, 9,821.99 and 3,930.75 is: 5,424.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,117.29 : 9,821.99 = 3,930.75 : x
  2. Step 2: Convert to fraction form
    7,117.29/9,821.99 = 3,930.75/x
  3. Step 3: Cross multiply
    7,117.29x = 9,821.99 × 3,930.75
  4. Step 4: Simplify right side
    7,117.29x = 38,607,797.02
  5. Step 5: Solve for x
    x = 38,607,797.02/7,117.29
  6. Step 6: Final answer
    x = 5,424.51

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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.