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Finding the Fourth Proportional to 6,443, 8,891.70 and 3,649.40

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Solution

The fourth proportional to 6,443, 8,891.70 and 3,649.40 is: 5,036.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,443 : 8,891.70 = 3,649.40 : x
  2. Step 2: Convert to fraction form
    6,443/8,891.70 = 3,649.40/x
  3. Step 3: Cross multiply
    6,443x = 8,891.70 × 3,649.40
  4. Step 4: Simplify right side
    6,443x = 32,449,369.98
  5. Step 5: Solve for x
    x = 32,449,369.98/6,443
  6. Step 6: Final answer
    x = 5,036.38

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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.