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Finding the Fourth Proportional to 18,299.76, 25,238.64 and 11,221.20

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Solution

The fourth proportional to 18,299.76, 25,238.64 and 11,221.20 is: 15,476.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,299.76 : 25,238.64 = 11,221.20 : x
  2. Step 2: Convert to fraction form
    18,299.76/25,238.64 = 11,221.20/x
  3. Step 3: Cross multiply
    18,299.76x = 25,238.64 × 11,221.20
  4. Step 4: Simplify right side
    18,299.76x = 283,207,827.17
  5. Step 5: Solve for x
    x = 283,207,827.17/18,299.76
  6. Step 6: Final answer
    x = 15,476.04

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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.