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Finding the Fourth Proportional to 20,476.66, 30,708.46 and 7,993.65

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Solution

The fourth proportional to 20,476.66, 30,708.46 and 7,993.65 is: 11,987.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.66 : 30,708.46 = 7,993.65 : x
  2. Step 2: Convert to fraction form
    20,476.66/30,708.46 = 7,993.65/x
  3. Step 3: Cross multiply
    20,476.66x = 30,708.46 × 7,993.65
  4. Step 4: Simplify right side
    20,476.66x = 245,472,681.28
  5. Step 5: Solve for x
    x = 245,472,681.28/20,476.66
  6. Step 6: Final answer
    x = 11,987.93

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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.