Home / 20,935.04-31,390.72-6,891.28

Finding the Fourth Proportional to 20,935.04, 31,390.72 and 6,891.28

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Solution

The fourth proportional to 20,935.04, 31,390.72 and 6,891.28 is: 10,333.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.04 : 31,390.72 = 6,891.28 : x
  2. Step 2: Convert to fraction form
    20,935.04/31,390.72 = 6,891.28/x
  3. Step 3: Cross multiply
    20,935.04x = 31,390.72 × 6,891.28
  4. Step 4: Simplify right side
    20,935.04x = 216,322,240.92
  5. Step 5: Solve for x
    x = 216,322,240.92/20,935.04
  6. Step 6: Final answer
    x = 10,333.02

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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.