Home / 28,629.68-39,509.19-15,883.70

Finding the Fourth Proportional to 28,629.68, 39,509.19 and 15,883.70

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Solution

The fourth proportional to 28,629.68, 39,509.19 and 15,883.70 is: 21,919.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,629.68 : 39,509.19 = 15,883.70 : x
  2. Step 2: Convert to fraction form
    28,629.68/39,509.19 = 15,883.70/x
  3. Step 3: Cross multiply
    28,629.68x = 39,509.19 × 15,883.70
  4. Step 4: Simplify right side
    28,629.68x = 627,551,923.66
  5. Step 5: Solve for x
    x = 627,551,923.66/28,629.68
  6. Step 6: Final answer
    x = 21,919.63

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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.