Home / 20,582.55-30,872.61-12,686.58

Finding the Fourth Proportional to 20,582.55, 30,872.61 and 12,686.58

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Solution

The fourth proportional to 20,582.55, 30,872.61 and 12,686.58 is: 19,029.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,582.55 : 30,872.61 = 12,686.58 : x
  2. Step 2: Convert to fraction form
    20,582.55/30,872.61 = 12,686.58/x
  3. Step 3: Cross multiply
    20,582.55x = 30,872.61 × 12,686.58
  4. Step 4: Simplify right side
    20,582.55x = 391,667,836.57
  5. Step 5: Solve for x
    x = 391,667,836.57/20,582.55
  6. Step 6: Final answer
    x = 19,029.12

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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.