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Finding the Fourth Proportional to 14,628.87, 20,187.83 and 7,914.48

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Solution

The fourth proportional to 14,628.87, 20,187.83 and 7,914.48 is: 10,921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,628.87 : 20,187.83 = 7,914.48 : x
  2. Step 2: Convert to fraction form
    14,628.87/20,187.83 = 7,914.48/x
  3. Step 3: Cross multiply
    14,628.87x = 20,187.83 × 7,914.48
  4. Step 4: Simplify right side
    14,628.87x = 159,776,120.86
  5. Step 5: Solve for x
    x = 159,776,120.86/14,628.87
  6. Step 6: Final answer
    x = 10,921.97

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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.