Home / 7,139.28-9,852.66-3,995.70

Finding the Fourth Proportional to 7,139.28, 9,852.66 and 3,995.70

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Solution

The fourth proportional to 7,139.28, 9,852.66 and 3,995.70 is: 5,514.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.28 : 9,852.66 = 3,995.70 : x
  2. Step 2: Convert to fraction form
    7,139.28/9,852.66 = 3,995.70/x
  3. Step 3: Cross multiply
    7,139.28x = 9,852.66 × 3,995.70
  4. Step 4: Simplify right side
    7,139.28x = 39,368,273.56
  5. Step 5: Solve for x
    x = 39,368,273.56/7,139.28
  6. Step 6: Final answer
    x = 5,514.32

Related Problems

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Half scale
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Double scale
Find fourth proportional to 7,140.28, 9,854.04 and 3,996.70
Similar ratio
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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.