Home / 15,828.71-21,843.83-9,115.52

Finding the Fourth Proportional to 15,828.71, 21,843.83 and 9,115.52

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Solution

The fourth proportional to 15,828.71, 21,843.83 and 9,115.52 is: 12,579.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,828.71 : 21,843.83 = 9,115.52 : x
  2. Step 2: Convert to fraction form
    15,828.71/21,843.83 = 9,115.52/x
  3. Step 3: Cross multiply
    15,828.71x = 21,843.83 × 9,115.52
  4. Step 4: Simplify right side
    15,828.71x = 199,117,714.44
  5. Step 5: Solve for x
    x = 199,117,714.44/15,828.71
  6. Step 6: Final answer
    x = 12,579.53

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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.