Home / 6,419.90-8,859.36-3,587.31

Finding the Fourth Proportional to 6,419.90, 8,859.36 and 3,587.31

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Solution

The fourth proportional to 6,419.90, 8,859.36 and 3,587.31 is: 4,950.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,419.90 : 8,859.36 = 3,587.31 : x
  2. Step 2: Convert to fraction form
    6,419.90/8,859.36 = 3,587.31/x
  3. Step 3: Cross multiply
    6,419.90x = 8,859.36 × 3,587.31
  4. Step 4: Simplify right side
    6,419.90x = 31,781,270.72
  5. Step 5: Solve for x
    x = 31,781,270.72/6,419.90
  6. Step 6: Final answer
    x = 4,950.43

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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.