Home / 10,999.20-15,178.56-7,860.64

Finding the Fourth Proportional to 10,999.20, 15,178.56 and 7,860.64

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Solution

The fourth proportional to 10,999.20, 15,178.56 and 7,860.64 is: 10,847.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.20 : 15,178.56 = 7,860.64 : x
  2. Step 2: Convert to fraction form
    10,999.20/15,178.56 = 7,860.64/x
  3. Step 3: Cross multiply
    10,999.20x = 15,178.56 × 7,860.64
  4. Step 4: Simplify right side
    10,999.20x = 119,313,195.88
  5. Step 5: Solve for x
    x = 119,313,195.88/10,999.20
  6. Step 6: Final answer
    x = 10,847.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.