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Finding the Fourth Proportional to 9,118, 12,608.76 and 8,705.44

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Solution

The fourth proportional to 9,118, 12,608.76 and 8,705.44 is: 12,038.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,118 : 12,608.76 = 8,705.44 : x
  2. Step 2: Convert to fraction form
    9,118/12,608.76 = 8,705.44/x
  3. Step 3: Cross multiply
    9,118x = 12,608.76 × 8,705.44
  4. Step 4: Simplify right side
    9,118x = 109,764,803.65
  5. Step 5: Solve for x
    x = 109,764,803.65/9,118
  6. Step 6: Final answer
    x = 12,038.25

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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.