Home / 21,137.42-31,737.18-20,764.10

Finding the Fourth Proportional to 21,137.42, 31,737.18 and 20,764.10

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Solution

The fourth proportional to 21,137.42, 31,737.18 and 20,764.10 is: 31,176.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,137.42 : 31,737.18 = 20,764.10 : x
  2. Step 2: Convert to fraction form
    21,137.42/31,737.18 = 20,764.10/x
  3. Step 3: Cross multiply
    21,137.42x = 31,737.18 × 20,764.10
  4. Step 4: Simplify right side
    21,137.42x = 658,993,979.24
  5. Step 5: Solve for x
    x = 658,993,979.24/21,137.42
  6. Step 6: Final answer
    x = 31,176.65

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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.