Home / 2,136.09-2,947.86-1,611.21

Finding the Fourth Proportional to 2,136.09, 2,947.86 and 1,611.21

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Solution

The fourth proportional to 2,136.09, 2,947.86 and 1,611.21 is: 2,223.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.09 : 2,947.86 = 1,611.21 : x
  2. Step 2: Convert to fraction form
    2,136.09/2,947.86 = 1,611.21/x
  3. Step 3: Cross multiply
    2,136.09x = 2,947.86 × 1,611.21
  4. Step 4: Simplify right side
    2,136.09x = 4,749,621.51
  5. Step 5: Solve for x
    x = 4,749,621.51/2,136.09
  6. Step 6: Final answer
    x = 2,223.51

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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.