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Finding the Fourth Proportional to 18,551.20, 25,615.56 and 12,182.80

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Solution

The fourth proportional to 18,551.20, 25,615.56 and 12,182.80 is: 16,822.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,551.20 : 25,615.56 = 12,182.80 : x
  2. Step 2: Convert to fraction form
    18,551.20/25,615.56 = 12,182.80/x
  3. Step 3: Cross multiply
    18,551.20x = 25,615.56 × 12,182.80
  4. Step 4: Simplify right side
    18,551.20x = 312,069,244.37
  5. Step 5: Solve for x
    x = 312,069,244.37/18,551.20
  6. Step 6: Final answer
    x = 16,822.05

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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.