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Finding the Fourth Proportional to 18,945.69, 26,147.50 and 15,753.50

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Solution

The fourth proportional to 18,945.69, 26,147.50 and 15,753.50 is: 21,741.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,945.69 : 26,147.50 = 15,753.50 : x
  2. Step 2: Convert to fraction form
    18,945.69/26,147.50 = 15,753.50/x
  3. Step 3: Cross multiply
    18,945.69x = 26,147.50 × 15,753.50
  4. Step 4: Simplify right side
    18,945.69x = 411,914,583.80
  5. Step 5: Solve for x
    x = 411,914,583.80/18,945.69
  6. Step 6: Final answer
    x = 21,741.86

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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.