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Finding the Fourth Proportional to 18,144.96, 25,036.80 and 10,972.80

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Solution

The fourth proportional to 18,144.96, 25,036.80 and 10,972.80 is: 15,140.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,144.96 : 25,036.80 = 10,972.80 : x
  2. Step 2: Convert to fraction form
    18,144.96/25,036.80 = 10,972.80/x
  3. Step 3: Cross multiply
    18,144.96x = 25,036.80 × 10,972.80
  4. Step 4: Simplify right side
    18,144.96x = 274,723,799.04
  5. Step 5: Solve for x
    x = 274,723,799.04/18,144.96
  6. Step 6: Final answer
    x = 15,140.50

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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.