Home / 20,856.17-28,780.48-12,367.88

Finding the Fourth Proportional to 20,856.17, 28,780.48 and 12,367.88

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Solution

The fourth proportional to 20,856.17, 28,780.48 and 12,367.88 is: 17,067.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.17 : 28,780.48 = 12,367.88 : x
  2. Step 2: Convert to fraction form
    20,856.17/28,780.48 = 12,367.88/x
  3. Step 3: Cross multiply
    20,856.17x = 28,780.48 × 12,367.88
  4. Step 4: Simplify right side
    20,856.17x = 355,953,522.98
  5. Step 5: Solve for x
    x = 355,953,522.98/20,856.17
  6. Step 6: Final answer
    x = 17,067.06

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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.