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Finding the Fourth Proportional to 18,874.55, 28,319.91 and 6,395.90

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Solution

The fourth proportional to 18,874.55, 28,319.91 and 6,395.90 is: 9,596.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.55 : 28,319.91 = 6,395.90 : x
  2. Step 2: Convert to fraction form
    18,874.55/28,319.91 = 6,395.90/x
  3. Step 3: Cross multiply
    18,874.55x = 28,319.91 × 6,395.90
  4. Step 4: Simplify right side
    18,874.55x = 181,131,170.77
  5. Step 5: Solve for x
    x = 181,131,170.77/18,874.55
  6. Step 6: Final answer
    x = 9,596.58

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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.