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Finding the Fourth Proportional to 18,690.66, 28,041.03 and 6,212.70

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Solution

The fourth proportional to 18,690.66, 28,041.03 and 6,212.70 is: 9,320.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.66 : 28,041.03 = 6,212.70 : x
  2. Step 2: Convert to fraction form
    18,690.66/28,041.03 = 6,212.70/x
  3. Step 3: Cross multiply
    18,690.66x = 28,041.03 × 6,212.70
  4. Step 4: Simplify right side
    18,690.66x = 174,210,507.08
  5. Step 5: Solve for x
    x = 174,210,507.08/18,690.66
  6. Step 6: Final answer
    x = 9,320.73

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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.