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Finding the Fourth Proportional to 8,489.94, 12,718.32 and 5,559.36

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Solution

The fourth proportional to 8,489.94, 12,718.32 and 5,559.36 is: 8,328.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,489.94 : 12,718.32 = 5,559.36 : x
  2. Step 2: Convert to fraction form
    8,489.94/12,718.32 = 5,559.36/x
  3. Step 3: Cross multiply
    8,489.94x = 12,718.32 × 5,559.36
  4. Step 4: Simplify right side
    8,489.94x = 70,705,719.48
  5. Step 5: Solve for x
    x = 70,705,719.48/8,489.94
  6. Step 6: Final answer
    x = 8,328.18

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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.