Home / 7,040.72-9,716.28-3,897.20

Finding the Fourth Proportional to 7,040.72, 9,716.28 and 3,897.20

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Solution

The fourth proportional to 7,040.72, 9,716.28 and 3,897.20 is: 5,378.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040.72 : 9,716.28 = 3,897.20 : x
  2. Step 2: Convert to fraction form
    7,040.72/9,716.28 = 3,897.20/x
  3. Step 3: Cross multiply
    7,040.72x = 9,716.28 × 3,897.20
  4. Step 4: Simplify right side
    7,040.72x = 37,866,286.42
  5. Step 5: Solve for x
    x = 37,866,286.42/7,040.72
  6. Step 6: Final answer
    x = 5,378.18

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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.