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Finding the Fourth Proportional to 15,168.78, 22,739.30 and 12,843.76

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Solution

The fourth proportional to 15,168.78, 22,739.30 and 12,843.76 is: 19,253.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,168.78 : 22,739.30 = 12,843.76 : x
  2. Step 2: Convert to fraction form
    15,168.78/22,739.30 = 12,843.76/x
  3. Step 3: Cross multiply
    15,168.78x = 22,739.30 × 12,843.76
  4. Step 4: Simplify right side
    15,168.78x = 292,058,111.77
  5. Step 5: Solve for x
    x = 292,058,111.77/15,168.78
  6. Step 6: Final answer
    x = 19,253.90

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1.5x scale

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.