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Finding the Fourth Proportional to 14,107.76, 21,162.65 and 4,747.74

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Solution

The fourth proportional to 14,107.76, 21,162.65 and 4,747.74 is: 7,121.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,107.76 : 21,162.65 = 4,747.74 : x
  2. Step 2: Convert to fraction form
    14,107.76/21,162.65 = 4,747.74/x
  3. Step 3: Cross multiply
    14,107.76x = 21,162.65 × 4,747.74
  4. Step 4: Simplify right side
    14,107.76x = 100,474,736.17
  5. Step 5: Solve for x
    x = 100,474,736.17/14,107.76
  6. Step 6: Final answer
    x = 7,121.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.