Home / 20,972.63-31,463.27-8,660.63

Finding the Fourth Proportional to 20,972.63, 31,463.27 and 8,660.63

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Solution

The fourth proportional to 20,972.63, 31,463.27 and 8,660.63 is: 12,992.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.63 : 31,463.27 = 8,660.63 : x
  2. Step 2: Convert to fraction form
    20,972.63/31,463.27 = 8,660.63/x
  3. Step 3: Cross multiply
    20,972.63x = 31,463.27 × 8,660.63
  4. Step 4: Simplify right side
    20,972.63x = 272,491,539.44
  5. Step 5: Solve for x
    x = 272,491,539.44/20,972.63
  6. Step 6: Final answer
    x = 12,992.72

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1.5x scale

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.