Home / 21,140.56-29,173.90-12,188.02

Finding the Fourth Proportional to 21,140.56, 29,173.90 and 12,188.02

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Solution

The fourth proportional to 21,140.56, 29,173.90 and 12,188.02 is: 16,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.56 : 29,173.90 = 12,188.02 : x
  2. Step 2: Convert to fraction form
    21,140.56/29,173.90 = 12,188.02/x
  3. Step 3: Cross multiply
    21,140.56x = 29,173.90 × 12,188.02
  4. Step 4: Simplify right side
    21,140.56x = 355,572,076.68
  5. Step 5: Solve for x
    x = 355,572,076.68/21,140.56
  6. Step 6: Final answer
    x = 16,819.43

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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.