Home / 7,129.66-9,839.16-3,943.12

Finding the Fourth Proportional to 7,129.66, 9,839.16 and 3,943.12

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Solution

The fourth proportional to 7,129.66, 9,839.16 and 3,943.12 is: 5,441.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.66 : 9,839.16 = 3,943.12 : x
  2. Step 2: Convert to fraction form
    7,129.66/9,839.16 = 3,943.12/x
  3. Step 3: Cross multiply
    7,129.66x = 9,839.16 × 3,943.12
  4. Step 4: Simplify right side
    7,129.66x = 38,796,988.58
  5. Step 5: Solve for x
    x = 38,796,988.58/7,129.66
  6. Step 6: Final answer
    x = 5,441.63

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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.