Home / 18,721.78-28,068.62-11,324.72

Finding the Fourth Proportional to 18,721.78, 28,068.62 and 11,324.72

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Solution

The fourth proportional to 18,721.78, 28,068.62 and 11,324.72 is: 16,978.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.78 : 28,068.62 = 11,324.72 : x
  2. Step 2: Convert to fraction form
    18,721.78/28,068.62 = 11,324.72/x
  3. Step 3: Cross multiply
    18,721.78x = 28,068.62 × 11,324.72
  4. Step 4: Simplify right side
    18,721.78x = 317,869,262.29
  5. Step 5: Solve for x
    x = 317,869,262.29/18,721.78
  6. Step 6: Final answer
    x = 16,978.58

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1.5x scale

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.