Home / 21,309.36-31,969.85-6,517.95

Finding the Fourth Proportional to 21,309.36, 31,969.85 and 6,517.95

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Solution

The fourth proportional to 21,309.36, 31,969.85 and 6,517.95 is: 9,778.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.36 : 31,969.85 = 6,517.95 : x
  2. Step 2: Convert to fraction form
    21,309.36/31,969.85 = 6,517.95/x
  3. Step 3: Cross multiply
    21,309.36x = 31,969.85 × 6,517.95
  4. Step 4: Simplify right side
    21,309.36x = 208,377,851.22
  5. Step 5: Solve for x
    x = 208,377,851.22/21,309.36
  6. Step 6: Final answer
    x = 9,778.70

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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.