Home / 28,468.53-39,286.87-15,721.70

Finding the Fourth Proportional to 28,468.53, 39,286.87 and 15,721.70

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Solution

The fourth proportional to 28,468.53, 39,286.87 and 15,721.70 is: 21,696.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,468.53 : 39,286.87 = 15,721.70 : x
  2. Step 2: Convert to fraction form
    28,468.53/39,286.87 = 15,721.70/x
  3. Step 3: Cross multiply
    28,468.53x = 39,286.87 × 15,721.70
  4. Step 4: Simplify right side
    28,468.53x = 617,656,148.34
  5. Step 5: Solve for x
    x = 617,656,148.34/28,468.53
  6. Step 6: Final answer
    x = 21,696.10

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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.