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Finding the Fourth Proportional to 15,874.28, 21,907.28 and 8,800.72

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Solution

The fourth proportional to 15,874.28, 21,907.28 and 8,800.72 is: 12,145.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,874.28 : 21,907.28 = 8,800.72 : x
  2. Step 2: Convert to fraction form
    15,874.28/21,907.28 = 8,800.72/x
  3. Step 3: Cross multiply
    15,874.28x = 21,907.28 × 8,800.72
  4. Step 4: Simplify right side
    15,874.28x = 192,799,837.24
  5. Step 5: Solve for x
    x = 192,799,837.24/15,874.28
  6. Step 6: Final answer
    x = 12,145.42

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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.