Home / 28,468.64-39,286.32-15,721.92

Finding the Fourth Proportional to 28,468.64, 39,286.32 and 15,721.92

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Solution

The fourth proportional to 28,468.64, 39,286.32 and 15,721.92 is: 21,696.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.64 : 39,286.32 = 15,721.92 : x
  2. Step 2: Convert to fraction form
    28,468.64/39,286.32 = 15,721.92/x
  3. Step 3: Cross multiply
    28,468.64x = 39,286.32 × 15,721.92
  4. Step 4: Simplify right side
    28,468.64x = 617,656,380.13
  5. Step 5: Solve for x
    x = 617,656,380.13/28,468.64
  6. Step 6: Final answer
    x = 21,696.03

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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.