Home / 21,973.78-32,982.54-12,117.70

Finding the Fourth Proportional to 21,973.78, 32,982.54 and 12,117.70

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Solution

The fourth proportional to 21,973.78, 32,982.54 and 12,117.70 is: 18,188.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,973.78 : 32,982.54 = 12,117.70 : x
  2. Step 2: Convert to fraction form
    21,973.78/32,982.54 = 12,117.70/x
  3. Step 3: Cross multiply
    21,973.78x = 32,982.54 × 12,117.70
  4. Step 4: Simplify right side
    21,973.78x = 399,672,524.96
  5. Step 5: Solve for x
    x = 399,672,524.96/21,973.78
  6. Step 6: Final answer
    x = 18,188.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.