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Finding the Fourth Proportional to 15,556.50, 21,467.97 and 9,967.50

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Solution

The fourth proportional to 15,556.50, 21,467.97 and 9,967.50 is: 13,755.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,556.50 : 21,467.97 = 9,967.50 : x
  2. Step 2: Convert to fraction form
    15,556.50/21,467.97 = 9,967.50/x
  3. Step 3: Cross multiply
    15,556.50x = 21,467.97 × 9,967.50
  4. Step 4: Simplify right side
    15,556.50x = 213,981,990.98
  5. Step 5: Solve for x
    x = 213,981,990.98/15,556.50
  6. Step 6: Final answer
    x = 13,755.15

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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.