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Finding the Fourth Proportional to 18,816.80, 25,964.80 and 10,433.12

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Solution

The fourth proportional to 18,816.80, 25,964.80 and 10,433.12 is: 14,396.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.80 : 25,964.80 = 10,433.12 : x
  2. Step 2: Convert to fraction form
    18,816.80/25,964.80 = 10,433.12/x
  3. Step 3: Cross multiply
    18,816.80x = 25,964.80 × 10,433.12
  4. Step 4: Simplify right side
    18,816.80x = 270,893,874.18
  5. Step 5: Solve for x
    x = 270,893,874.18/18,816.80
  6. Step 6: Final answer
    x = 14,396.38

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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.