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Finding the Fourth Proportional to 14,620.16, 20,175.78 and 7,905.74

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Solution

The fourth proportional to 14,620.16, 20,175.78 and 7,905.74 is: 10,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,620.16 : 20,175.78 = 7,905.74 : x
  2. Step 2: Convert to fraction form
    14,620.16/20,175.78 = 7,905.74/x
  3. Step 3: Cross multiply
    14,620.16x = 20,175.78 × 7,905.74
  4. Step 4: Simplify right side
    14,620.16x = 159,504,470.98
  5. Step 5: Solve for x
    x = 159,504,470.98/14,620.16
  6. Step 6: Final answer
    x = 10,909.90

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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.