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Finding the Fourth Proportional to 8,423.87, 12,621.47 and 5,953.95

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Solution

The fourth proportional to 8,423.87, 12,621.47 and 5,953.95 is: 8,920.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,423.87 : 12,621.47 = 5,953.95 : x
  2. Step 2: Convert to fraction form
    8,423.87/12,621.47 = 5,953.95/x
  3. Step 3: Cross multiply
    8,423.87x = 12,621.47 × 5,953.95
  4. Step 4: Simplify right side
    8,423.87x = 75,147,571.54
  5. Step 5: Solve for x
    x = 75,147,571.54/8,423.87
  6. Step 6: Final answer
    x = 8,920.79

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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.