Home / 21,180.13-31,768.66-8,696.77

Finding the Fourth Proportional to 21,180.13, 31,768.66 and 8,696.77

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Solution

The fourth proportional to 21,180.13, 31,768.66 and 8,696.77 is: 13,044.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.13 : 31,768.66 = 8,696.77 : x
  2. Step 2: Convert to fraction form
    21,180.13/31,768.66 = 8,696.77/x
  3. Step 3: Cross multiply
    21,180.13x = 31,768.66 × 8,696.77
  4. Step 4: Simplify right side
    21,180.13x = 276,284,611.76
  5. Step 5: Solve for x
    x = 276,284,611.76/21,180.13
  6. Step 6: Final answer
    x = 13,044.52

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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.