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Finding the Fourth Proportional to 18,708.35, 25,821.96 and 10,755.20

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Solution

The fourth proportional to 18,708.35, 25,821.96 and 10,755.20 is: 14,844.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.35 : 25,821.96 = 10,755.20 : x
  2. Step 2: Convert to fraction form
    18,708.35/25,821.96 = 10,755.20/x
  3. Step 3: Cross multiply
    18,708.35x = 25,821.96 × 10,755.20
  4. Step 4: Simplify right side
    18,708.35x = 277,720,223.17
  5. Step 5: Solve for x
    x = 277,720,223.17/18,708.35
  6. Step 6: Final answer
    x = 14,844.72

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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.