Home / 21,189.50-29,137.83-18,390.14

Finding the Fourth Proportional to 21,189.50, 29,137.83 and 18,390.14

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Solution

The fourth proportional to 21,189.50, 29,137.83 and 18,390.14 is: 25,288.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.50 : 29,137.83 = 18,390.14 : x
  2. Step 2: Convert to fraction form
    21,189.50/29,137.83 = 18,390.14/x
  3. Step 3: Cross multiply
    21,189.50x = 29,137.83 × 18,390.14
  4. Step 4: Simplify right side
    21,189.50x = 535,848,773.00
  5. Step 5: Solve for x
    x = 535,848,773.00/21,189.50
  6. Step 6: Final answer
    x = 25,288.41

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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.