Home / 28,487.46-39,286.68-21,760.58

Finding the Fourth Proportional to 28,487.46, 39,286.68 and 21,760.58

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Solution

The fourth proportional to 28,487.46, 39,286.68 and 21,760.58 is: 30,009.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,487.46 : 39,286.68 = 21,760.58 : x
  2. Step 2: Convert to fraction form
    28,487.46/39,286.68 = 21,760.58/x
  3. Step 3: Cross multiply
    28,487.46x = 39,286.68 × 21,760.58
  4. Step 4: Simplify right side
    28,487.46x = 854,900,943.07
  5. Step 5: Solve for x
    x = 854,900,943.07/28,487.46
  6. Step 6: Final answer
    x = 30,009.73

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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.