Home / 28,319.04-39,022.68-21,906.69

Finding the Fourth Proportional to 28,319.04, 39,022.68 and 21,906.69

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Solution

The fourth proportional to 28,319.04, 39,022.68 and 21,906.69 is: 30,186.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.04 : 39,022.68 = 21,906.69 : x
  2. Step 2: Convert to fraction form
    28,319.04/39,022.68 = 21,906.69/x
  3. Step 3: Cross multiply
    28,319.04x = 39,022.68 × 21,906.69
  4. Step 4: Simplify right side
    28,319.04x = 854,857,753.73
  5. Step 5: Solve for x
    x = 854,857,753.73/28,319.04
  6. Step 6: Final answer
    x = 30,186.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.