Home / 6,985.50-9,639.99-4,191.90

Finding the Fourth Proportional to 6,985.50, 9,639.99 and 4,191.90

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Solution

The fourth proportional to 6,985.50, 9,639.99 and 4,191.90 is: 5,784.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,985.50 : 9,639.99 = 4,191.90 : x
  2. Step 2: Convert to fraction form
    6,985.50/9,639.99 = 4,191.90/x
  3. Step 3: Cross multiply
    6,985.50x = 9,639.99 × 4,191.90
  4. Step 4: Simplify right side
    6,985.50x = 40,409,874.08
  5. Step 5: Solve for x
    x = 40,409,874.08/6,985.50
  6. Step 6: Final answer
    x = 5,784.82

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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.