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Finding the Fourth Proportional to 18,705.30, 25,809.87 and 10,747.86

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Solution

The fourth proportional to 18,705.30, 25,809.87 and 10,747.86 is: 14,830.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,705.30 : 25,809.87 = 10,747.86 : x
  2. Step 2: Convert to fraction form
    18,705.30/25,809.87 = 10,747.86/x
  3. Step 3: Cross multiply
    18,705.30x = 25,809.87 × 10,747.86
  4. Step 4: Simplify right side
    18,705.30x = 277,400,740.33
  5. Step 5: Solve for x
    x = 277,400,740.33/18,705.30
  6. Step 6: Final answer
    x = 14,830.06

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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.