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Finding the Fourth Proportional to 7,755.29, 10,702.21 and 4,218.42

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Solution

The fourth proportional to 7,755.29, 10,702.21 and 4,218.42 is: 5,821.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,755.29 : 10,702.21 = 4,218.42 : x
  2. Step 2: Convert to fraction form
    7,755.29/10,702.21 = 4,218.42/x
  3. Step 3: Cross multiply
    7,755.29x = 10,702.21 × 4,218.42
  4. Step 4: Simplify right side
    7,755.29x = 45,146,416.71
  5. Step 5: Solve for x
    x = 45,146,416.71/7,755.29
  6. Step 6: Final answer
    x = 5,821.37

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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.