Home / 20,981.82-28,953.78-12,028.88

Finding the Fourth Proportional to 20,981.82, 28,953.78 and 12,028.88

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Solution

The fourth proportional to 20,981.82, 28,953.78 and 12,028.88 is: 16,599.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.82 : 28,953.78 = 12,028.88 : x
  2. Step 2: Convert to fraction form
    20,981.82/28,953.78 = 12,028.88/x
  3. Step 3: Cross multiply
    20,981.82x = 28,953.78 × 12,028.88
  4. Step 4: Simplify right side
    20,981.82x = 348,281,545.17
  5. Step 5: Solve for x
    x = 348,281,545.17/20,981.82
  6. Step 6: Final answer
    x = 16,599.21

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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.