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Finding the Fourth Proportional to 12,630.84, 18,947.62 and 10,311.71

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Solution

The fourth proportional to 12,630.84, 18,947.62 and 10,311.71 is: 15,468.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,630.84 : 18,947.62 = 10,311.71 : x
  2. Step 2: Convert to fraction form
    12,630.84/18,947.62 = 10,311.71/x
  3. Step 3: Cross multiply
    12,630.84x = 18,947.62 × 10,311.71
  4. Step 4: Simplify right side
    12,630.84x = 195,382,280.78
  5. Step 5: Solve for x
    x = 195,382,280.78/12,630.84
  6. Step 6: Final answer
    x = 15,468.67

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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.