Home / 20,928.66-28,868.74-12,425.01

Finding the Fourth Proportional to 20,928.66, 28,868.74 and 12,425.01

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Solution

The fourth proportional to 20,928.66, 28,868.74 and 12,425.01 is: 17,138.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.66 : 28,868.74 = 12,425.01 : x
  2. Step 2: Convert to fraction form
    20,928.66/28,868.74 = 12,425.01/x
  3. Step 3: Cross multiply
    20,928.66x = 28,868.74 × 12,425.01
  4. Step 4: Simplify right side
    20,928.66x = 358,694,383.19
  5. Step 5: Solve for x
    x = 358,694,383.19/20,928.66
  6. Step 6: Final answer
    x = 17,138.91

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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.