Home / 19,137.68-28,703.28-5,286.72

Finding the Fourth Proportional to 19,137.68, 28,703.28 and 5,286.72

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Solution

The fourth proportional to 19,137.68, 28,703.28 and 5,286.72 is: 7,929.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,137.68 : 28,703.28 = 5,286.72 : x
  2. Step 2: Convert to fraction form
    19,137.68/28,703.28 = 5,286.72/x
  3. Step 3: Cross multiply
    19,137.68x = 28,703.28 × 5,286.72
  4. Step 4: Simplify right side
    19,137.68x = 151,746,204.44
  5. Step 5: Solve for x
    x = 151,746,204.44/19,137.68
  6. Step 6: Final answer
    x = 7,929.18

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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.