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Finding the Fourth Proportional to 15,345.43, 21,176.91 and 9,375.82

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Solution

The fourth proportional to 15,345.43, 21,176.91 and 9,375.82 is: 12,938.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,345.43 : 21,176.91 = 9,375.82 : x
  2. Step 2: Convert to fraction form
    15,345.43/21,176.91 = 9,375.82/x
  3. Step 3: Cross multiply
    15,345.43x = 21,176.91 × 9,375.82
  4. Step 4: Simplify right side
    15,345.43x = 198,550,843.37
  5. Step 5: Solve for x
    x = 198,550,843.37/15,345.43
  6. Step 6: Final answer
    x = 12,938.76

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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.