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Finding the Fourth Proportional to 9,339.76, 12,889.78 and 6,977.80

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Solution

The fourth proportional to 9,339.76, 12,889.78 and 6,977.80 is: 9,630.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.76 : 12,889.78 = 6,977.80 : x
  2. Step 2: Convert to fraction form
    9,339.76/12,889.78 = 6,977.80/x
  3. Step 3: Cross multiply
    9,339.76x = 12,889.78 × 6,977.80
  4. Step 4: Simplify right side
    9,339.76x = 89,942,306.88
  5. Step 5: Solve for x
    x = 89,942,306.88/9,339.76
  6. Step 6: Final answer
    x = 9,630.04

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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.