Home / 20,840.49-31,251.29-8,988.66

Finding the Fourth Proportional to 20,840.49, 31,251.29 and 8,988.66

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Solution

The fourth proportional to 20,840.49, 31,251.29 and 8,988.66 is: 13,478.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.49 : 31,251.29 = 8,988.66 : x
  2. Step 2: Convert to fraction form
    20,840.49/31,251.29 = 8,988.66/x
  3. Step 3: Cross multiply
    20,840.49x = 31,251.29 × 8,988.66
  4. Step 4: Simplify right side
    20,840.49x = 280,907,175.43
  5. Step 5: Solve for x
    x = 280,907,175.43/20,840.49
  6. Step 6: Final answer
    x = 13,478.91

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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.