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Finding the Fourth Proportional to 14,721.21, 20,314.87 and 8,007.12

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Solution

The fourth proportional to 14,721.21, 20,314.87 and 8,007.12 is: 11,049.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,721.21 : 20,314.87 = 8,007.12 : x
  2. Step 2: Convert to fraction form
    14,721.21/20,314.87 = 8,007.12/x
  3. Step 3: Cross multiply
    14,721.21x = 20,314.87 × 8,007.12
  4. Step 4: Simplify right side
    14,721.21x = 162,663,581.86
  5. Step 5: Solve for x
    x = 162,663,581.86/14,721.21
  6. Step 6: Final answer
    x = 11,049.61

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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.