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Finding the Fourth Proportional to 6,623.80, 9,921.30 and 5,759.80

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Solution

The fourth proportional to 6,623.80, 9,921.30 and 5,759.80 is: 8,627.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,623.80 : 9,921.30 = 5,759.80 : x
  2. Step 2: Convert to fraction form
    6,623.80/9,921.30 = 5,759.80/x
  3. Step 3: Cross multiply
    6,623.80x = 9,921.30 × 5,759.80
  4. Step 4: Simplify right side
    6,623.80x = 57,144,703.74
  5. Step 5: Solve for x
    x = 57,144,703.74/6,623.80
  6. Step 6: Final answer
    x = 8,627.18

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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.