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Finding the Fourth Proportional to 18,854.30, 28,285.09 and 7,166.61

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Solution

The fourth proportional to 18,854.30, 28,285.09 and 7,166.61 is: 10,751.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,854.30 : 28,285.09 = 7,166.61 : x
  2. Step 2: Convert to fraction form
    18,854.30/28,285.09 = 7,166.61/x
  3. Step 3: Cross multiply
    18,854.30x = 28,285.09 × 7,166.61
  4. Step 4: Simplify right side
    18,854.30x = 202,708,031.59
  5. Step 5: Solve for x
    x = 202,708,031.59/18,854.30
  6. Step 6: Final answer
    x = 10,751.29

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1.5x scale

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.