Home / 7,800.20-11,705.24-5,687.88

Finding the Fourth Proportional to 7,800.20, 11,705.24 and 5,687.88

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Solution

The fourth proportional to 7,800.20, 11,705.24 and 5,687.88 is: 8,535.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,800.20 : 11,705.24 = 5,687.88 : x
  2. Step 2: Convert to fraction form
    7,800.20/11,705.24 = 5,687.88/x
  3. Step 3: Cross multiply
    7,800.20x = 11,705.24 × 5,687.88
  4. Step 4: Simplify right side
    7,800.20x = 66,578,000.49
  5. Step 5: Solve for x
    x = 66,578,000.49/7,800.20
  6. Step 6: Final answer
    x = 8,535.42

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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.