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Finding the Fourth Proportional to 3,571.99, 4,929.52 and 2,155.65

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Solution

The fourth proportional to 3,571.99, 4,929.52 and 2,155.65 is: 2,974.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,571.99 : 4,929.52 = 2,155.65 : x
  2. Step 2: Convert to fraction form
    3,571.99/4,929.52 = 2,155.65/x
  3. Step 3: Cross multiply
    3,571.99x = 4,929.52 × 2,155.65
  4. Step 4: Simplify right side
    3,571.99x = 10,626,334.18
  5. Step 5: Solve for x
    x = 10,626,334.18/3,571.99
  6. Step 6: Final answer
    x = 2,974.91

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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.