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Finding the Fourth Proportional to 6,645.80, 9,954.30 and 5,781.80

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Solution

The fourth proportional to 6,645.80, 9,954.30 and 5,781.80 is: 8,660.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,645.80 : 9,954.30 = 5,781.80 : x
  2. Step 2: Convert to fraction form
    6,645.80/9,954.30 = 5,781.80/x
  3. Step 3: Cross multiply
    6,645.80x = 9,954.30 × 5,781.80
  4. Step 4: Simplify right side
    6,645.80x = 57,553,771.74
  5. Step 5: Solve for x
    x = 57,553,771.74/6,645.80
  6. Step 6: Final answer
    x = 8,660.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.