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Finding the Fourth Proportional to 8,719.50, 12,083.63 and 8,553.30

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Solution

The fourth proportional to 8,719.50, 12,083.63 and 8,553.30 is: 11,853.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.50 : 12,083.63 = 8,553.30 : x
  2. Step 2: Convert to fraction form
    8,719.50/12,083.63 = 8,553.30/x
  3. Step 3: Cross multiply
    8,719.50x = 12,083.63 × 8,553.30
  4. Step 4: Simplify right side
    8,719.50x = 103,354,869.71
  5. Step 5: Solve for x
    x = 103,354,869.71/8,719.50
  6. Step 6: Final answer
    x = 11,853.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.