Home / 7,780.10-11,665.46-3,100.84

Finding the Fourth Proportional to 7,780.10, 11,665.46 and 3,100.84

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Solution

The fourth proportional to 7,780.10, 11,665.46 and 3,100.84 is: 4,649.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.10 : 11,665.46 = 3,100.84 : x
  2. Step 2: Convert to fraction form
    7,780.10/11,665.46 = 3,100.84/x
  3. Step 3: Cross multiply
    7,780.10x = 11,665.46 × 3,100.84
  4. Step 4: Simplify right side
    7,780.10x = 36,172,724.99
  5. Step 5: Solve for x
    x = 36,172,724.99/7,780.10
  6. Step 6: Final answer
    x = 4,649.39

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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.