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Finding the Fourth Proportional to 18,772.61, 25,905.47 and 11,223.14

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Solution

The fourth proportional to 18,772.61, 25,905.47 and 11,223.14 is: 15,487.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.61 : 25,905.47 = 11,223.14 : x
  2. Step 2: Convert to fraction form
    18,772.61/25,905.47 = 11,223.14/x
  3. Step 3: Cross multiply
    18,772.61x = 25,905.47 × 11,223.14
  4. Step 4: Simplify right side
    18,772.61x = 290,740,530.93
  5. Step 5: Solve for x
    x = 290,740,530.93/18,772.61
  6. Step 6: Final answer
    x = 15,487.49

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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.