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Finding the Fourth Proportional to 18,690.67, 28,030.20 and 6,207.90

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Solution

The fourth proportional to 18,690.67, 28,030.20 and 6,207.90 is: 9,309.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,690.67 : 28,030.20 = 6,207.90 : x
  2. Step 2: Convert to fraction form
    18,690.67/28,030.20 = 6,207.90/x
  3. Step 3: Cross multiply
    18,690.67x = 28,030.20 × 6,207.90
  4. Step 4: Simplify right side
    18,690.67x = 174,008,678.58
  5. Step 5: Solve for x
    x = 174,008,678.58/18,690.67
  6. Step 6: Final answer
    x = 9,309.92

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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.