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Finding the Fourth Proportional to 18,801.71, 25,945.59 and 11,243.58

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Solution

The fourth proportional to 18,801.71, 25,945.59 and 11,243.58 is: 15,515.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,801.71 : 25,945.59 = 11,243.58 : x
  2. Step 2: Convert to fraction form
    18,801.71/25,945.59 = 11,243.58/x
  3. Step 3: Cross multiply
    18,801.71x = 25,945.59 × 11,243.58
  4. Step 4: Simplify right side
    18,801.71x = 291,721,358.98
  5. Step 5: Solve for x
    x = 291,721,358.98/18,801.71
  6. Step 6: Final answer
    x = 15,515.68

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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.