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Finding the Fourth Proportional to 18,868.62, 28,302.94 and 6,397.44

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Solution

The fourth proportional to 18,868.62, 28,302.94 and 6,397.44 is: 9,596.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,868.62 : 28,302.94 = 6,397.44 : x
  2. Step 2: Convert to fraction form
    18,868.62/28,302.94 = 6,397.44/x
  3. Step 3: Cross multiply
    18,868.62x = 28,302.94 × 6,397.44
  4. Step 4: Simplify right side
    18,868.62x = 181,066,262.33
  5. Step 5: Solve for x
    x = 181,066,262.33/18,868.62
  6. Step 6: Final answer
    x = 9,596.16

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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.