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Finding the Fourth Proportional to 15,447.88, 21,317.90 and 8,374.22

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Solution

The fourth proportional to 15,447.88, 21,317.90 and 8,374.22 is: 11,556.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,447.88 : 21,317.90 = 8,374.22 : x
  2. Step 2: Convert to fraction form
    15,447.88/21,317.90 = 8,374.22/x
  3. Step 3: Cross multiply
    15,447.88x = 21,317.90 × 8,374.22
  4. Step 4: Simplify right side
    15,447.88x = 178,520,784.54
  5. Step 5: Solve for x
    x = 178,520,784.54/15,447.88
  6. Step 6: Final answer
    x = 11,556.33

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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.