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Finding the Fourth Proportional to 15,874.38, 21,907.94 and 8,800.65

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Solution

The fourth proportional to 15,874.38, 21,907.94 and 8,800.65 is: 12,145.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.38 : 21,907.94 = 8,800.65 : x
  2. Step 2: Convert to fraction form
    15,874.38/21,907.94 = 8,800.65/x
  3. Step 3: Cross multiply
    15,874.38x = 21,907.94 × 8,800.65
  4. Step 4: Simplify right side
    15,874.38x = 192,804,068.16
  5. Step 5: Solve for x
    x = 192,804,068.16/15,874.38
  6. Step 6: Final answer
    x = 12,145.61

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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.