Home / 20,941.88-28,900.01-11,381.76

Finding the Fourth Proportional to 20,941.88, 28,900.01 and 11,381.76

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Solution

The fourth proportional to 20,941.88, 28,900.01 and 11,381.76 is: 15,706.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.88 : 28,900.01 = 11,381.76 : x
  2. Step 2: Convert to fraction form
    20,941.88/28,900.01 = 11,381.76/x
  3. Step 3: Cross multiply
    20,941.88x = 28,900.01 × 11,381.76
  4. Step 4: Simplify right side
    20,941.88x = 328,933,078.52
  5. Step 5: Solve for x
    x = 328,933,078.52/20,941.88
  6. Step 6: Final answer
    x = 15,706.95

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1.5x scale

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.