Home / 7,139.89-9,853.08-3,995.88

Finding the Fourth Proportional to 7,139.89, 9,853.08 and 3,995.88

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Solution

The fourth proportional to 7,139.89, 9,853.08 and 3,995.88 is: 5,514.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.89 : 9,853.08 = 3,995.88 : x
  2. Step 2: Convert to fraction form
    7,139.89/9,853.08 = 3,995.88/x
  3. Step 3: Cross multiply
    7,139.89x = 9,853.08 × 3,995.88
  4. Step 4: Simplify right side
    7,139.89x = 39,371,725.31
  5. Step 5: Solve for x
    x = 39,371,725.31/7,139.89
  6. Step 6: Final answer
    x = 5,514.33

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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.