Home / 3,904.65-5,388.15-2,136.21

Finding the Fourth Proportional to 3,904.65, 5,388.15 and 2,136.21

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Solution

The fourth proportional to 3,904.65, 5,388.15 and 2,136.21 is: 2,947.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,904.65 : 5,388.15 = 2,136.21 : x
  2. Step 2: Convert to fraction form
    3,904.65/5,388.15 = 2,136.21/x
  3. Step 3: Cross multiply
    3,904.65x = 5,388.15 × 2,136.21
  4. Step 4: Simplify right side
    3,904.65x = 11,510,219.91
  5. Step 5: Solve for x
    x = 11,510,219.91/3,904.65
  6. Step 6: Final answer
    x = 2,947.82

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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.