Home / 5,686.12-8,531.66-1,991.01

Finding the Fourth Proportional to 5,686.12, 8,531.66 and 1,991.01

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Solution

The fourth proportional to 5,686.12, 8,531.66 and 1,991.01 is: 2,987.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,686.12 : 8,531.66 = 1,991.01 : x
  2. Step 2: Convert to fraction form
    5,686.12/8,531.66 = 1,991.01/x
  3. Step 3: Cross multiply
    5,686.12x = 8,531.66 × 1,991.01
  4. Step 4: Simplify right side
    5,686.12x = 16,986,620.38
  5. Step 5: Solve for x
    x = 16,986,620.38/5,686.12
  6. Step 6: Final answer
    x = 2,987.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.