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Finding the Fourth Proportional to 18,725, 28,095.70 and 8,871.32

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Solution

The fourth proportional to 18,725, 28,095.70 and 8,871.32 is: 13,310.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,725 : 28,095.70 = 8,871.32 : x
  2. Step 2: Convert to fraction form
    18,725/28,095.70 = 8,871.32/x
  3. Step 3: Cross multiply
    18,725x = 28,095.70 × 8,871.32
  4. Step 4: Simplify right side
    18,725x = 249,245,945.32
  5. Step 5: Solve for x
    x = 249,245,945.32/18,725
  6. Step 6: Final answer
    x = 13,310.86

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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.