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Finding the Fourth Proportional to 18,709.80, 25,821.06 and 10,753.32

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Solution

The fourth proportional to 18,709.80, 25,821.06 and 10,753.32 is: 14,840.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.80 : 25,821.06 = 10,753.32 : x
  2. Step 2: Convert to fraction form
    18,709.80/25,821.06 = 10,753.32/x
  3. Step 3: Cross multiply
    18,709.80x = 25,821.06 × 10,753.32
  4. Step 4: Simplify right side
    18,709.80x = 277,662,120.92
  5. Step 5: Solve for x
    x = 277,662,120.92/18,709.80
  6. Step 6: Final answer
    x = 14,840.46

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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.