Home / 10,879.40-15,013.56-5,911.40

Finding the Fourth Proportional to 10,879.40, 15,013.56 and 5,911.40

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Solution

The fourth proportional to 10,879.40, 15,013.56 and 5,911.40 is: 8,157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.40 : 15,013.56 = 5,911.40 : x
  2. Step 2: Convert to fraction form
    10,879.40/15,013.56 = 5,911.40/x
  3. Step 3: Cross multiply
    10,879.40x = 15,013.56 × 5,911.40
  4. Step 4: Simplify right side
    10,879.40x = 88,751,158.58
  5. Step 5: Solve for x
    x = 88,751,158.58/10,879.40
  6. Step 6: Final answer
    x = 8,157.73

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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.