Home / 20,972.21-31,451.65-6,929.62

Finding the Fourth Proportional to 20,972.21, 31,451.65 and 6,929.62

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Solution

The fourth proportional to 20,972.21, 31,451.65 and 6,929.62 is: 10,392.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.21 : 31,451.65 = 6,929.62 : x
  2. Step 2: Convert to fraction form
    20,972.21/31,451.65 = 6,929.62/x
  3. Step 3: Cross multiply
    20,972.21x = 31,451.65 × 6,929.62
  4. Step 4: Simplify right side
    20,972.21x = 217,947,886.92
  5. Step 5: Solve for x
    x = 217,947,886.92/20,972.21
  6. Step 6: Final answer
    x = 10,392.22

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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.