Home / 7,139.60-9,852.96-3,995.72

Finding the Fourth Proportional to 7,139.60, 9,852.96 and 3,995.72

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Solution

The fourth proportional to 7,139.60, 9,852.96 and 3,995.72 is: 5,514.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.60 : 9,852.96 = 3,995.72 : x
  2. Step 2: Convert to fraction form
    7,139.60/9,852.96 = 3,995.72/x
  3. Step 3: Cross multiply
    7,139.60x = 9,852.96 × 3,995.72
  4. Step 4: Simplify right side
    7,139.60x = 39,369,669.33
  5. Step 5: Solve for x
    x = 39,369,669.33/7,139.60
  6. Step 6: Final answer
    x = 5,514.27

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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.