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Finding the Fourth Proportional to 18,801.72, 28,202.58 and 9,574.20

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Solution

The fourth proportional to 18,801.72, 28,202.58 and 9,574.20 is: 14,361.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.72 : 28,202.58 = 9,574.20 : x
  2. Step 2: Convert to fraction form
    18,801.72/28,202.58 = 9,574.20/x
  3. Step 3: Cross multiply
    18,801.72x = 28,202.58 × 9,574.20
  4. Step 4: Simplify right side
    18,801.72x = 270,017,141.44
  5. Step 5: Solve for x
    x = 270,017,141.44/18,801.72
  6. Step 6: Final answer
    x = 14,361.30

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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.