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Finding the Fourth Proportional to 18,828.48, 28,224.35 and 8,965.11

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Solution

The fourth proportional to 18,828.48, 28,224.35 and 8,965.11 is: 13,438.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,828.48 : 28,224.35 = 8,965.11 : x
  2. Step 2: Convert to fraction form
    18,828.48/28,224.35 = 8,965.11/x
  3. Step 3: Cross multiply
    18,828.48x = 28,224.35 × 8,965.11
  4. Step 4: Simplify right side
    18,828.48x = 253,034,402.43
  5. Step 5: Solve for x
    x = 253,034,402.43/18,828.48
  6. Step 6: Final answer
    x = 13,438.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.