Home / 21,399.86-29,531.86-11,968.58

Finding the Fourth Proportional to 21,399.86, 29,531.86 and 11,968.58

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Solution

The fourth proportional to 21,399.86, 29,531.86 and 11,968.58 is: 16,516.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.86 : 29,531.86 = 11,968.58 : x
  2. Step 2: Convert to fraction form
    21,399.86/29,531.86 = 11,968.58/x
  3. Step 3: Cross multiply
    21,399.86x = 29,531.86 × 11,968.58
  4. Step 4: Simplify right side
    21,399.86x = 353,454,428.96
  5. Step 5: Solve for x
    x = 353,454,428.96/21,399.86
  6. Step 6: Final answer
    x = 16,516.67

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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.