Home / 20,781.65-31,165.38-5,986.59

Finding the Fourth Proportional to 20,781.65, 31,165.38 and 5,986.59

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Solution

The fourth proportional to 20,781.65, 31,165.38 and 5,986.59 is: 8,977.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.65 : 31,165.38 = 5,986.59 : x
  2. Step 2: Convert to fraction form
    20,781.65/31,165.38 = 5,986.59/x
  3. Step 3: Cross multiply
    20,781.65x = 31,165.38 × 5,986.59
  4. Step 4: Simplify right side
    20,781.65x = 186,574,352.25
  5. Step 5: Solve for x
    x = 186,574,352.25/20,781.65
  6. Step 6: Final answer
    x = 8,977.84

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1.5x scale

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.