Home / 15,447.89-21,318.12-8,374.33

Finding the Fourth Proportional to 15,447.89, 21,318.12 and 8,374.33

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Solution

The fourth proportional to 15,447.89, 21,318.12 and 8,374.33 is: 11,556.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,447.89 : 21,318.12 = 8,374.33 : x
  2. Step 2: Convert to fraction form
    15,447.89/21,318.12 = 8,374.33/x
  3. Step 3: Cross multiply
    15,447.89x = 21,318.12 × 8,374.33
  4. Step 4: Simplify right side
    15,447.89x = 178,524,971.86
  5. Step 5: Solve for x
    x = 178,524,971.86/15,447.89
  6. Step 6: Final answer
    x = 11,556.59

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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.