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Finding the Fourth Proportional to 7,755.53, 10,702.76 and 4,218.76

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Solution

The fourth proportional to 7,755.53, 10,702.76 and 4,218.76 is: 5,821.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,755.53 : 10,702.76 = 4,218.76 : x
  2. Step 2: Convert to fraction form
    7,755.53/10,702.76 = 4,218.76/x
  3. Step 3: Cross multiply
    7,755.53x = 10,702.76 × 4,218.76
  4. Step 4: Simplify right side
    7,755.53x = 45,152,375.78
  5. Step 5: Solve for x
    x = 45,152,375.78/7,755.53
  6. Step 6: Final answer
    x = 5,821.96

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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.