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Finding the Fourth Proportional to 6,381.27, 8,810.51 and 5,205.15

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Solution

The fourth proportional to 6,381.27, 8,810.51 and 5,205.15 is: 7,186.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,381.27 : 8,810.51 = 5,205.15 : x
  2. Step 2: Convert to fraction form
    6,381.27/8,810.51 = 5,205.15/x
  3. Step 3: Cross multiply
    6,381.27x = 8,810.51 × 5,205.15
  4. Step 4: Simplify right side
    6,381.27x = 45,860,000.10
  5. Step 5: Solve for x
    x = 45,860,000.10/6,381.27
  6. Step 6: Final answer
    x = 7,186.66

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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.