Home / 6,985.31-9,638.97-4,000.85

Finding the Fourth Proportional to 6,985.31, 9,638.97 and 4,000.85

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Solution

The fourth proportional to 6,985.31, 9,638.97 and 4,000.85 is: 5,520.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.31 : 9,638.97 = 4,000.85 : x
  2. Step 2: Convert to fraction form
    6,985.31/9,638.97 = 4,000.85/x
  3. Step 3: Cross multiply
    6,985.31x = 9,638.97 × 4,000.85
  4. Step 4: Simplify right side
    6,985.31x = 38,564,073.12
  5. Step 5: Solve for x
    x = 38,564,073.12/6,985.31
  6. Step 6: Final answer
    x = 5,520.74

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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.