Home / 7,020.80-9,689.28-3,877.28

Finding the Fourth Proportional to 7,020.80, 9,689.28 and 3,877.28

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Solution

The fourth proportional to 7,020.80, 9,689.28 and 3,877.28 is: 5,350.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020.80 : 9,689.28 = 3,877.28 : x
  2. Step 2: Convert to fraction form
    7,020.80/9,689.28 = 3,877.28/x
  3. Step 3: Cross multiply
    7,020.80x = 9,689.28 × 3,877.28
  4. Step 4: Simplify right side
    7,020.80x = 37,568,051.56
  5. Step 5: Solve for x
    x = 37,568,051.56/7,020.80
  6. Step 6: Final answer
    x = 5,350.96

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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.