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Finding the Fourth Proportional to 8,919.75, 12,309.36 and 4,940.93

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Solution

The fourth proportional to 8,919.75, 12,309.36 and 4,940.93 is: 6,818.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.75 : 12,309.36 = 4,940.93 : x
  2. Step 2: Convert to fraction form
    8,919.75/12,309.36 = 4,940.93/x
  3. Step 3: Cross multiply
    8,919.75x = 12,309.36 × 4,940.93
  4. Step 4: Simplify right side
    8,919.75x = 60,819,686.10
  5. Step 5: Solve for x
    x = 60,819,686.10/8,919.75
  6. Step 6: Final answer
    x = 6,818.54

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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.