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Finding the Fourth Proportional to 8,755.40, 12,083.64 and 5,218.40

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Solution

The fourth proportional to 8,755.40, 12,083.64 and 5,218.40 is: 7,202.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,755.40 : 12,083.64 = 5,218.40 : x
  2. Step 2: Convert to fraction form
    8,755.40/12,083.64 = 5,218.40/x
  3. Step 3: Cross multiply
    8,755.40x = 12,083.64 × 5,218.40
  4. Step 4: Simplify right side
    8,755.40x = 63,057,266.98
  5. Step 5: Solve for x
    x = 63,057,266.98/8,755.40
  6. Step 6: Final answer
    x = 7,202.10

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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.