Home / 21,067.32-31,576.50-7,911.30

Finding the Fourth Proportional to 21,067.32, 31,576.50 and 7,911.30

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Solution

The fourth proportional to 21,067.32, 31,576.50 and 7,911.30 is: 11,857.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.32 : 31,576.50 = 7,911.30 : x
  2. Step 2: Convert to fraction form
    21,067.32/31,576.50 = 7,911.30/x
  3. Step 3: Cross multiply
    21,067.32x = 31,576.50 × 7,911.30
  4. Step 4: Simplify right side
    21,067.32x = 249,811,164.45
  5. Step 5: Solve for x
    x = 249,811,164.45/21,067.32
  6. Step 6: Final answer
    x = 11,857.76

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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.