Home / 28,468.26-39,285.63-15,720.71

Finding the Fourth Proportional to 28,468.26, 39,285.63 and 15,720.71

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Solution

The fourth proportional to 28,468.26, 39,285.63 and 15,720.71 is: 21,694.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.26 : 39,285.63 = 15,720.71 : x
  2. Step 2: Convert to fraction form
    28,468.26/39,285.63 = 15,720.71/x
  3. Step 3: Cross multiply
    28,468.26x = 39,285.63 × 15,720.71
  4. Step 4: Simplify right side
    28,468.26x = 617,597,799.97
  5. Step 5: Solve for x
    x = 617,597,799.97/28,468.26
  6. Step 6: Final answer
    x = 21,694.26

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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.