Home / 7,891.30-10,884.54-6,399.28

Finding the Fourth Proportional to 7,891.30, 10,884.54 and 6,399.28

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Solution

The fourth proportional to 7,891.30, 10,884.54 and 6,399.28 is: 8,826.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.30 : 10,884.54 = 6,399.28 : x
  2. Step 2: Convert to fraction form
    7,891.30/10,884.54 = 6,399.28/x
  3. Step 3: Cross multiply
    7,891.30x = 10,884.54 × 6,399.28
  4. Step 4: Simplify right side
    7,891.30x = 69,653,219.13
  5. Step 5: Solve for x
    x = 69,653,219.13/7,891.30
  6. Step 6: Final answer
    x = 8,826.58

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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.