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Finding the Fourth Proportional to 28,464.75, 42,613.02 and 21,019.77

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Solution

The fourth proportional to 28,464.75, 42,613.02 and 21,019.77 is: 31,467.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,464.75 : 42,613.02 = 21,019.77 : x
  2. Step 2: Convert to fraction form
    28,464.75/42,613.02 = 21,019.77/x
  3. Step 3: Cross multiply
    28,464.75x = 42,613.02 × 21,019.77
  4. Step 4: Simplify right side
    28,464.75x = 895,715,879.41
  5. Step 5: Solve for x
    x = 895,715,879.41/28,464.75
  6. Step 6: Final answer
    x = 31,467.55

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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.