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Finding the Fourth Proportional to 8,812.70, 13,219.88 and 3,191.79

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Solution

The fourth proportional to 8,812.70, 13,219.88 and 3,191.79 is: 4,787.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.70 : 13,219.88 = 3,191.79 : x
  2. Step 2: Convert to fraction form
    8,812.70/13,219.88 = 3,191.79/x
  3. Step 3: Cross multiply
    8,812.70x = 13,219.88 × 3,191.79
  4. Step 4: Simplify right side
    8,812.70x = 42,195,080.79
  5. Step 5: Solve for x
    x = 42,195,080.79/8,812.70
  6. Step 6: Final answer
    x = 4,787.99

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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.