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Finding the Fourth Proportional to 15,872.80, 21,905.76 and 8,801.32

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Solution

The fourth proportional to 15,872.80, 21,905.76 and 8,801.32 is: 12,146.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872.80 : 21,905.76 = 8,801.32 : x
  2. Step 2: Convert to fraction form
    15,872.80/21,905.76 = 8,801.32/x
  3. Step 3: Cross multiply
    15,872.80x = 21,905.76 × 8,801.32
  4. Step 4: Simplify right side
    15,872.80x = 192,799,603.60
  5. Step 5: Solve for x
    x = 192,799,603.60/15,872.80
  6. Step 6: Final answer
    x = 12,146.54

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1.5x scale

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.