Home / 7,139.35-9,852.08-3,952.78

Finding the Fourth Proportional to 7,139.35, 9,852.08 and 3,952.78

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Solution

The fourth proportional to 7,139.35, 9,852.08 and 3,952.78 is: 5,454.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.35 : 9,852.08 = 3,952.78 : x
  2. Step 2: Convert to fraction form
    7,139.35/9,852.08 = 3,952.78/x
  3. Step 3: Cross multiply
    7,139.35x = 9,852.08 × 3,952.78
  4. Step 4: Simplify right side
    7,139.35x = 38,943,104.78
  5. Step 5: Solve for x
    x = 38,943,104.78/7,139.35
  6. Step 6: Final answer
    x = 5,454.71

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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.