Home / 20,516.94-28,305.78-15,737.72

Finding the Fourth Proportional to 20,516.94, 28,305.78 and 15,737.72

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Solution

The fourth proportional to 20,516.94, 28,305.78 and 15,737.72 is: 21,712.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.94 : 28,305.78 = 15,737.72 : x
  2. Step 2: Convert to fraction form
    20,516.94/28,305.78 = 15,737.72/x
  3. Step 3: Cross multiply
    20,516.94x = 28,305.78 × 15,737.72
  4. Step 4: Simplify right side
    20,516.94x = 445,468,440.02
  5. Step 5: Solve for x
    x = 445,468,440.02/20,516.94
  6. Step 6: Final answer
    x = 21,712.23

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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.