Home / 20,725.57-28,601.75-12,229.76

Finding the Fourth Proportional to 20,725.57, 28,601.75 and 12,229.76

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Solution

The fourth proportional to 20,725.57, 28,601.75 and 12,229.76 is: 16,877.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.57 : 28,601.75 = 12,229.76 : x
  2. Step 2: Convert to fraction form
    20,725.57/28,601.75 = 12,229.76/x
  3. Step 3: Cross multiply
    20,725.57x = 28,601.75 × 12,229.76
  4. Step 4: Simplify right side
    20,725.57x = 349,792,464.11
  5. Step 5: Solve for x
    x = 349,792,464.11/20,725.57
  6. Step 6: Final answer
    x = 16,877.34

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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.