Home / 2,136.20-2,947.81-1,239.96

Finding the Fourth Proportional to 2,136.20, 2,947.81 and 1,239.96

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Solution

The fourth proportional to 2,136.20, 2,947.81 and 1,239.96 is: 1,711.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.20 : 2,947.81 = 1,239.96 : x
  2. Step 2: Convert to fraction form
    2,136.20/2,947.81 = 1,239.96/x
  3. Step 3: Cross multiply
    2,136.20x = 2,947.81 × 1,239.96
  4. Step 4: Simplify right side
    2,136.20x = 3,655,166.49
  5. Step 5: Solve for x
    x = 3,655,166.49/2,136.20
  6. Step 6: Final answer
    x = 1,711.06

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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.