Home / 21,143.95-31,704.40-10,764.43

Finding the Fourth Proportional to 21,143.95, 31,704.40 and 10,764.43

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Solution

The fourth proportional to 21,143.95, 31,704.40 and 10,764.43 is: 16,140.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.95 : 31,704.40 = 10,764.43 : x
  2. Step 2: Convert to fraction form
    21,143.95/31,704.40 = 10,764.43/x
  3. Step 3: Cross multiply
    21,143.95x = 31,704.40 × 10,764.43
  4. Step 4: Simplify right side
    21,143.95x = 341,279,794.49
  5. Step 5: Solve for x
    x = 341,279,794.49/21,143.95
  6. Step 6: Final answer
    x = 16,140.78

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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.