Home / 10,115.20-15,175.79-5,188.30

Finding the Fourth Proportional to 10,115.20, 15,175.79 and 5,188.30

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Solution

The fourth proportional to 10,115.20, 15,175.79 and 5,188.30 is: 7,783.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.20 : 15,175.79 = 5,188.30 : x
  2. Step 2: Convert to fraction form
    10,115.20/15,175.79 = 5,188.30/x
  3. Step 3: Cross multiply
    10,115.20x = 15,175.79 × 5,188.30
  4. Step 4: Simplify right side
    10,115.20x = 78,736,551.26
  5. Step 5: Solve for x
    x = 78,736,551.26/10,115.20
  6. Step 6: Final answer
    x = 7,783.98

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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.