Home / 28,481.22-42,639.21-21,490.11

Finding the Fourth Proportional to 28,481.22, 42,639.21 and 21,490.11

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Solution

The fourth proportional to 28,481.22, 42,639.21 and 21,490.11 is: 32,172.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.22 : 42,639.21 = 21,490.11 : x
  2. Step 2: Convert to fraction form
    28,481.22/42,639.21 = 21,490.11/x
  3. Step 3: Cross multiply
    28,481.22x = 42,639.21 × 21,490.11
  4. Step 4: Simplify right side
    28,481.22x = 916,321,313.21
  5. Step 5: Solve for x
    x = 916,321,313.21/28,481.22
  6. Step 6: Final answer
    x = 32,172.83

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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.