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Finding the Fourth Proportional to 20,523.58, 30,787.12 and 6,479.85

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Solution

The fourth proportional to 20,523.58, 30,787.12 and 6,479.85 is: 9,720.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,523.58 : 30,787.12 = 6,479.85 : x
  2. Step 2: Convert to fraction form
    20,523.58/30,787.12 = 6,479.85/x
  3. Step 3: Cross multiply
    20,523.58x = 30,787.12 × 6,479.85
  4. Step 4: Simplify right side
    20,523.58x = 199,495,919.53
  5. Step 5: Solve for x
    x = 199,495,919.53/20,523.58
  6. Step 6: Final answer
    x = 9,720.33

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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.