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Finding the Fourth Proportional to 21,952.48, 30,291.60 and 12,520.48

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Solution

The fourth proportional to 21,952.48, 30,291.60 and 12,520.48 is: 17,276.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,952.48 : 30,291.60 = 12,520.48 : x
  2. Step 2: Convert to fraction form
    21,952.48/30,291.60 = 12,520.48/x
  3. Step 3: Cross multiply
    21,952.48x = 30,291.60 × 12,520.48
  4. Step 4: Simplify right side
    21,952.48x = 379,265,371.97
  5. Step 5: Solve for x
    x = 379,265,371.97/21,952.48
  6. Step 6: Final answer
    x = 17,276.65

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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.