Home / 21,127.57-31,722.50-11,785.84

Finding the Fourth Proportional to 21,127.57, 31,722.50 and 11,785.84

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Solution

The fourth proportional to 21,127.57, 31,722.50 and 11,785.84 is: 17,696.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.57 : 31,722.50 = 11,785.84 : x
  2. Step 2: Convert to fraction form
    21,127.57/31,722.50 = 11,785.84/x
  3. Step 3: Cross multiply
    21,127.57x = 31,722.50 × 11,785.84
  4. Step 4: Simplify right side
    21,127.57x = 373,876,309.40
  5. Step 5: Solve for x
    x = 373,876,309.40/21,127.57
  6. Step 6: Final answer
    x = 17,696.13

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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.