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Finding the Fourth Proportional to 18,968.90, 28,452.13 and 5,820.17

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Solution

The fourth proportional to 18,968.90, 28,452.13 and 5,820.17 is: 8,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.90 : 28,452.13 = 5,820.17 : x
  2. Step 2: Convert to fraction form
    18,968.90/28,452.13 = 5,820.17/x
  3. Step 3: Cross multiply
    18,968.90x = 28,452.13 × 5,820.17
  4. Step 4: Simplify right side
    18,968.90x = 165,596,076.65
  5. Step 5: Solve for x
    x = 165,596,076.65/18,968.90
  6. Step 6: Final answer
    x = 8,729.87

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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.