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Finding the Fourth Proportional to 12,963.20, 19,449.60 and 12,483.20

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Solution

The fourth proportional to 12,963.20, 19,449.60 and 12,483.20 is: 18,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,963.20 : 19,449.60 = 12,483.20 : x
  2. Step 2: Convert to fraction form
    12,963.20/19,449.60 = 12,483.20/x
  3. Step 3: Cross multiply
    12,963.20x = 19,449.60 × 12,483.20
  4. Step 4: Simplify right side
    12,963.20x = 242,793,246.72
  5. Step 5: Solve for x
    x = 242,793,246.72/12,963.20
  6. Step 6: Final answer
    x = 18,729.42

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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.