Home / 21,418.70-32,139.48-8,947.22

Finding the Fourth Proportional to 21,418.70, 32,139.48 and 8,947.22

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Solution

The fourth proportional to 21,418.70, 32,139.48 and 8,947.22 is: 13,425.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.70 : 32,139.48 = 8,947.22 : x
  2. Step 2: Convert to fraction form
    21,418.70/32,139.48 = 8,947.22/x
  3. Step 3: Cross multiply
    21,418.70x = 32,139.48 × 8,947.22
  4. Step 4: Simplify right side
    21,418.70x = 287,558,998.25
  5. Step 5: Solve for x
    x = 287,558,998.25/21,418.70
  6. Step 6: Final answer
    x = 13,425.60

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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.