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Finding the Fourth Proportional to 8,398.95, 12,603.30 and 4,239.29

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Solution

The fourth proportional to 8,398.95, 12,603.30 and 4,239.29 is: 6,361.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.95 : 12,603.30 = 4,239.29 : x
  2. Step 2: Convert to fraction form
    8,398.95/12,603.30 = 4,239.29/x
  3. Step 3: Cross multiply
    8,398.95x = 12,603.30 × 4,239.29
  4. Step 4: Simplify right side
    8,398.95x = 53,429,043.66
  5. Step 5: Solve for x
    x = 53,429,043.66/8,398.95
  6. Step 6: Final answer
    x = 6,361.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.