Home / 10,078.88-15,119.89-5,145.85

Finding the Fourth Proportional to 10,078.88, 15,119.89 and 5,145.85

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Solution

The fourth proportional to 10,078.88, 15,119.89 and 5,145.85 is: 7,719.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,078.88 : 15,119.89 = 5,145.85 : x
  2. Step 2: Convert to fraction form
    10,078.88/15,119.89 = 5,145.85/x
  3. Step 3: Cross multiply
    10,078.88x = 15,119.89 × 5,145.85
  4. Step 4: Simplify right side
    10,078.88x = 77,804,660.23
  5. Step 5: Solve for x
    x = 77,804,660.23/10,078.88
  6. Step 6: Final answer
    x = 7,719.57

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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.