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Finding the Fourth Proportional to 9,411.78, 12,993.88 and 5,879.77

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Solution

The fourth proportional to 9,411.78, 12,993.88 and 5,879.77 is: 8,117.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,411.78 : 12,993.88 = 5,879.77 : x
  2. Step 2: Convert to fraction form
    9,411.78/12,993.88 = 5,879.77/x
  3. Step 3: Cross multiply
    9,411.78x = 12,993.88 × 5,879.77
  4. Step 4: Simplify right side
    9,411.78x = 76,401,025.81
  5. Step 5: Solve for x
    x = 76,401,025.81/9,411.78
  6. Step 6: Final answer
    x = 8,117.60

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Similar ratio
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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.