Home / 20,394.46-28,142.70-11,440.72

Finding the Fourth Proportional to 20,394.46, 28,142.70 and 11,440.72

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Solution

The fourth proportional to 20,394.46, 28,142.70 and 11,440.72 is: 15,787.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,394.46 : 28,142.70 = 11,440.72 : x
  2. Step 2: Convert to fraction form
    20,394.46/28,142.70 = 11,440.72/x
  3. Step 3: Cross multiply
    20,394.46x = 28,142.70 × 11,440.72
  4. Step 4: Simplify right side
    20,394.46x = 321,972,750.74
  5. Step 5: Solve for x
    x = 321,972,750.74/20,394.46
  6. Step 6: Final answer
    x = 15,787.27

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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.