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Finding the Fourth Proportional to 15,220, 21,003.60 and 8,596

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Solution

The fourth proportional to 15,220, 21,003.60 and 8,596 is: 11,862.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,220 : 21,003.60 = 8,596 : x
  2. Step 2: Convert to fraction form
    15,220/21,003.60 = 8,596/x
  3. Step 3: Cross multiply
    15,220x = 21,003.60 × 8,596
  4. Step 4: Simplify right side
    15,220x = 180,546,945.60
  5. Step 5: Solve for x
    x = 180,546,945.60/15,220
  6. Step 6: Final answer
    x = 11,862.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.