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Finding the Fourth Proportional to 21,671.78, 32,481.08 and 12,319.62

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Solution

The fourth proportional to 21,671.78, 32,481.08 and 12,319.62 is: 18,464.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,671.78 : 32,481.08 = 12,319.62 : x
  2. Step 2: Convert to fraction form
    21,671.78/32,481.08 = 12,319.62/x
  3. Step 3: Cross multiply
    21,671.78x = 32,481.08 × 12,319.62
  4. Step 4: Simplify right side
    21,671.78x = 400,154,562.79
  5. Step 5: Solve for x
    x = 400,154,562.79/21,671.78
  6. Step 6: Final answer
    x = 18,464.31

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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.