Home / 7,999.28-11,115.62-7,901.36

Finding the Fourth Proportional to 7,999.28, 11,115.62 and 7,901.36

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Solution

The fourth proportional to 7,999.28, 11,115.62 and 7,901.36 is: 10,979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,999.28 : 11,115.62 = 7,901.36 : x
  2. Step 2: Convert to fraction form
    7,999.28/11,115.62 = 7,901.36/x
  3. Step 3: Cross multiply
    7,999.28x = 11,115.62 × 7,901.36
  4. Step 4: Simplify right side
    7,999.28x = 87,828,515.24
  5. Step 5: Solve for x
    x = 87,828,515.24/7,999.28
  6. Step 6: Final answer
    x = 10,979.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.