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Finding the Fourth Proportional to 18,651.52, 25,760.40 and 12,673.20

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Solution

The fourth proportional to 18,651.52, 25,760.40 and 12,673.20 is: 17,503.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,651.52 : 25,760.40 = 12,673.20 : x
  2. Step 2: Convert to fraction form
    18,651.52/25,760.40 = 12,673.20/x
  3. Step 3: Cross multiply
    18,651.52x = 25,760.40 × 12,673.20
  4. Step 4: Simplify right side
    18,651.52x = 326,466,701.28
  5. Step 5: Solve for x
    x = 326,466,701.28/18,651.52
  6. Step 6: Final answer
    x = 17,503.49

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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.