Home / 5,151.91-7,728.78-1,869.59

Finding the Fourth Proportional to 5,151.91, 7,728.78 and 1,869.59

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Solution

The fourth proportional to 5,151.91, 7,728.78 and 1,869.59 is: 2,804.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.91 : 7,728.78 = 1,869.59 : x
  2. Step 2: Convert to fraction form
    5,151.91/7,728.78 = 1,869.59/x
  3. Step 3: Cross multiply
    5,151.91x = 7,728.78 × 1,869.59
  4. Step 4: Simplify right side
    5,151.91x = 14,449,649.80
  5. Step 5: Solve for x
    x = 14,449,649.80/5,151.91
  6. Step 6: Final answer
    x = 2,804.72

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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.