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Finding the Fourth Proportional to 20,479.68, 30,718.44 and 5,689.44

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Solution

The fourth proportional to 20,479.68, 30,718.44 and 5,689.44 is: 8,533.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.68 : 30,718.44 = 5,689.44 : x
  2. Step 2: Convert to fraction form
    20,479.68/30,718.44 = 5,689.44/x
  3. Step 3: Cross multiply
    20,479.68x = 30,718.44 × 5,689.44
  4. Step 4: Simplify right side
    20,479.68x = 174,770,721.27
  5. Step 5: Solve for x
    x = 174,770,721.27/20,479.68
  6. Step 6: Final answer
    x = 8,533.86

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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.