Home / 7,139.47-9,852.53-3,995.65

Finding the Fourth Proportional to 7,139.47, 9,852.53 and 3,995.65

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Solution

The fourth proportional to 7,139.47, 9,852.53 and 3,995.65 is: 5,514.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.47 : 9,852.53 = 3,995.65 : x
  2. Step 2: Convert to fraction form
    7,139.47/9,852.53 = 3,995.65/x
  3. Step 3: Cross multiply
    7,139.47x = 9,852.53 × 3,995.65
  4. Step 4: Simplify right side
    7,139.47x = 39,367,241.52
  5. Step 5: Solve for x
    x = 39,367,241.52/7,139.47
  6. Step 6: Final answer
    x = 5,514.03

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Half scale
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Double scale
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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.