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Finding the Fourth Proportional to 18,188, 25,099.71 and 11,112.92

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Solution

The fourth proportional to 18,188, 25,099.71 and 11,112.92 is: 15,335.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,188 : 25,099.71 = 11,112.92 : x
  2. Step 2: Convert to fraction form
    18,188/25,099.71 = 11,112.92/x
  3. Step 3: Cross multiply
    18,188x = 25,099.71 × 11,112.92
  4. Step 4: Simplify right side
    18,188x = 278,931,069.25
  5. Step 5: Solve for x
    x = 278,931,069.25/18,188
  6. Step 6: Final answer
    x = 15,335.99

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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.