Home / 7,780.38-11,659.63-3,388.63

Finding the Fourth Proportional to 7,780.38, 11,659.63 and 3,388.63

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Solution

The fourth proportional to 7,780.38, 11,659.63 and 3,388.63 is: 5,078.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,780.38 : 11,659.63 = 3,388.63 : x
  2. Step 2: Convert to fraction form
    7,780.38/11,659.63 = 3,388.63/x
  3. Step 3: Cross multiply
    7,780.38x = 11,659.63 × 3,388.63
  4. Step 4: Simplify right side
    7,780.38x = 39,510,172.01
  5. Step 5: Solve for x
    x = 39,510,172.01/7,780.38
  6. Step 6: Final answer
    x = 5,078.18

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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.