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Finding the Fourth Proportional to 20,007.68, 30,012.04 and 6,860

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Solution

The fourth proportional to 20,007.68, 30,012.04 and 6,860 is: 10,290.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,007.68 : 30,012.04 = 6,860 : x
  2. Step 2: Convert to fraction form
    20,007.68/30,012.04 = 6,860/x
  3. Step 3: Cross multiply
    20,007.68x = 30,012.04 × 6,860
  4. Step 4: Simplify right side
    20,007.68x = 205,882,594.40
  5. Step 5: Solve for x
    x = 205,882,594.40/20,007.68
  6. Step 6: Final answer
    x = 10,290.18

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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.