Home / 21,388.86-29,516.82-11,829.39

Finding the Fourth Proportional to 21,388.86, 29,516.82 and 11,829.39

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Solution

The fourth proportional to 21,388.86, 29,516.82 and 11,829.39 is: 16,324.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.86 : 29,516.82 = 11,829.39 : x
  2. Step 2: Convert to fraction form
    21,388.86/29,516.82 = 11,829.39/x
  3. Step 3: Cross multiply
    21,388.86x = 29,516.82 × 11,829.39
  4. Step 4: Simplify right side
    21,388.86x = 349,165,975.34
  5. Step 5: Solve for x
    x = 349,165,975.34/21,388.86
  6. Step 6: Final answer
    x = 16,324.67

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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.