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Finding the Fourth Proportional to 22,272.48, 30,734.88 and 12,840.48

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Solution

The fourth proportional to 22,272.48, 30,734.88 and 12,840.48 is: 17,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,272.48 : 30,734.88 = 12,840.48 : x
  2. Step 2: Convert to fraction form
    22,272.48/30,734.88 = 12,840.48/x
  3. Step 3: Cross multiply
    22,272.48x = 30,734.88 × 12,840.48
  4. Step 4: Simplify right side
    22,272.48x = 394,650,611.94
  5. Step 5: Solve for x
    x = 394,650,611.94/22,272.48
  6. Step 6: Final answer
    x = 17,719.20

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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.