Home / 21,100.04-31,631.44-7,961.64

Finding the Fourth Proportional to 21,100.04, 31,631.44 and 7,961.64

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Solution

The fourth proportional to 21,100.04, 31,631.44 and 7,961.64 is: 11,935.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.04 : 31,631.44 = 7,961.64 : x
  2. Step 2: Convert to fraction form
    21,100.04/31,631.44 = 7,961.64/x
  3. Step 3: Cross multiply
    21,100.04x = 31,631.44 × 7,961.64
  4. Step 4: Simplify right side
    21,100.04x = 251,838,137.96
  5. Step 5: Solve for x
    x = 251,838,137.96/21,100.04
  6. Step 6: Final answer
    x = 11,935.43

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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.