Home / 21,255.28-31,876.44-17,085.40

Finding the Fourth Proportional to 21,255.28, 31,876.44 and 17,085.40

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Solution

The fourth proportional to 21,255.28, 31,876.44 and 17,085.40 is: 25,622.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.28 : 31,876.44 = 17,085.40 : x
  2. Step 2: Convert to fraction form
    21,255.28/31,876.44 = 17,085.40/x
  3. Step 3: Cross multiply
    21,255.28x = 31,876.44 × 17,085.40
  4. Step 4: Simplify right side
    21,255.28x = 544,621,727.98
  5. Step 5: Solve for x
    x = 544,621,727.98/21,255.28
  6. Step 6: Final answer
    x = 25,622.89

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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.