Home / 20,871.57-31,307.37-6,081.65

Finding the Fourth Proportional to 20,871.57, 31,307.37 and 6,081.65

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Solution

The fourth proportional to 20,871.57, 31,307.37 and 6,081.65 is: 9,122.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.57 : 31,307.37 = 6,081.65 : x
  2. Step 2: Convert to fraction form
    20,871.57/31,307.37 = 6,081.65/x
  3. Step 3: Cross multiply
    20,871.57x = 31,307.37 × 6,081.65
  4. Step 4: Simplify right side
    20,871.57x = 190,400,310.22
  5. Step 5: Solve for x
    x = 190,400,310.22/20,871.57
  6. Step 6: Final answer
    x = 9,122.47

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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.