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Finding the Fourth Proportional to 6,398.70, 8,828.67 and 3,604.20

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Solution

The fourth proportional to 6,398.70, 8,828.67 and 3,604.20 is: 4,972.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,398.70 : 8,828.67 = 3,604.20 : x
  2. Step 2: Convert to fraction form
    6,398.70/8,828.67 = 3,604.20/x
  3. Step 3: Cross multiply
    6,398.70x = 8,828.67 × 3,604.20
  4. Step 4: Simplify right side
    6,398.70x = 31,820,292.41
  5. Step 5: Solve for x
    x = 31,820,292.41/6,398.70
  6. Step 6: Final answer
    x = 4,972.93

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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.