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Finding the Fourth Proportional to 18,693, 28,012.72 and 8,827.20

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Solution

The fourth proportional to 18,693, 28,012.72 and 8,827.20 is: 13,228.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693 : 28,012.72 = 8,827.20 : x
  2. Step 2: Convert to fraction form
    18,693/28,012.72 = 8,827.20/x
  3. Step 3: Cross multiply
    18,693x = 28,012.72 × 8,827.20
  4. Step 4: Simplify right side
    18,693x = 247,273,881.98
  5. Step 5: Solve for x
    x = 247,273,881.98/18,693
  6. Step 6: Final answer
    x = 13,228.15

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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.