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Finding the Fourth Proportional to 18,964.80, 28,447.20 and 18,527.40

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Solution

The fourth proportional to 18,964.80, 28,447.20 and 18,527.40 is: 27,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,964.80 : 28,447.20 = 18,527.40 : x
  2. Step 2: Convert to fraction form
    18,964.80/28,447.20 = 18,527.40/x
  3. Step 3: Cross multiply
    18,964.80x = 28,447.20 × 18,527.40
  4. Step 4: Simplify right side
    18,964.80x = 527,052,653.28
  5. Step 5: Solve for x
    x = 527,052,653.28/18,964.80
  6. Step 6: Final answer
    x = 27,791.10

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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.