Home / 28,568.73-42,865.20-15,405.74

Finding the Fourth Proportional to 28,568.73, 42,865.20 and 15,405.74

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Solution

The fourth proportional to 28,568.73, 42,865.20 and 15,405.74 is: 23,115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,568.73 : 42,865.20 = 15,405.74 : x
  2. Step 2: Convert to fraction form
    28,568.73/42,865.20 = 15,405.74/x
  3. Step 3: Cross multiply
    28,568.73x = 42,865.20 × 15,405.74
  4. Step 4: Simplify right side
    28,568.73x = 660,369,911.92
  5. Step 5: Solve for x
    x = 660,369,911.92/28,568.73
  6. Step 6: Final answer
    x = 23,115.13

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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.