Home / 2,636.76-3,947.85-1,985.52

Finding the Fourth Proportional to 2,636.76, 3,947.85 and 1,985.52

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Solution

The fourth proportional to 2,636.76, 3,947.85 and 1,985.52 is: 2,972.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.76 : 3,947.85 = 1,985.52 : x
  2. Step 2: Convert to fraction form
    2,636.76/3,947.85 = 1,985.52/x
  3. Step 3: Cross multiply
    2,636.76x = 3,947.85 × 1,985.52
  4. Step 4: Simplify right side
    2,636.76x = 7,838,535.13
  5. Step 5: Solve for x
    x = 7,838,535.13/2,636.76
  6. Step 6: Final answer
    x = 2,972.79

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1.5x scale

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.