Home / 3,117.50-4,302.61-1,999.70

Finding the Fourth Proportional to 3,117.50, 4,302.61 and 1,999.70

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Solution

The fourth proportional to 3,117.50, 4,302.61 and 1,999.70 is: 2,759.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.50 : 4,302.61 = 1,999.70 : x
  2. Step 2: Convert to fraction form
    3,117.50/4,302.61 = 1,999.70/x
  3. Step 3: Cross multiply
    3,117.50x = 4,302.61 × 1,999.70
  4. Step 4: Simplify right side
    3,117.50x = 8,603,929.22
  5. Step 5: Solve for x
    x = 8,603,929.22/3,117.50
  6. Step 6: Final answer
    x = 2,759.88

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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.