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Finding the Fourth Proportional to 18,813.50, 25,963.13 and 10,636.46

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Solution

The fourth proportional to 18,813.50, 25,963.13 and 10,636.46 is: 14,678.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.50 : 25,963.13 = 10,636.46 : x
  2. Step 2: Convert to fraction form
    18,813.50/25,963.13 = 10,636.46/x
  3. Step 3: Cross multiply
    18,813.50x = 25,963.13 × 10,636.46
  4. Step 4: Simplify right side
    18,813.50x = 276,155,793.72
  5. Step 5: Solve for x
    x = 276,155,793.72/18,813.50
  6. Step 6: Final answer
    x = 14,678.60

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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.