Home / 20,836.66-31,255.14-6,985.66

Finding the Fourth Proportional to 20,836.66, 31,255.14 and 6,985.66

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Solution

The fourth proportional to 20,836.66, 31,255.14 and 6,985.66 is: 10,478.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.66 : 31,255.14 = 6,985.66 : x
  2. Step 2: Convert to fraction form
    20,836.66/31,255.14 = 6,985.66/x
  3. Step 3: Cross multiply
    20,836.66x = 31,255.14 × 6,985.66
  4. Step 4: Simplify right side
    20,836.66x = 218,337,781.29
  5. Step 5: Solve for x
    x = 218,337,781.29/20,836.66
  6. Step 6: Final answer
    x = 10,478.54

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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.