Home / 20,863.76-28,806.72-12,908.48

Finding the Fourth Proportional to 20,863.76, 28,806.72 and 12,908.48

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Solution

The fourth proportional to 20,863.76, 28,806.72 and 12,908.48 is: 17,822.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.76 : 28,806.72 = 12,908.48 : x
  2. Step 2: Convert to fraction form
    20,863.76/28,806.72 = 12,908.48/x
  3. Step 3: Cross multiply
    20,863.76x = 28,806.72 × 12,908.48
  4. Step 4: Simplify right side
    20,863.76x = 371,850,968.99
  5. Step 5: Solve for x
    x = 371,850,968.99/20,863.76
  6. Step 6: Final answer
    x = 17,822.82

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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.