Home / 21,067.12-31,576.36-7,911.08

Finding the Fourth Proportional to 21,067.12, 31,576.36 and 7,911.08

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Solution

The fourth proportional to 21,067.12, 31,576.36 and 7,911.08 is: 11,857.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,067.12 : 31,576.36 = 7,911.08 : x
  2. Step 2: Convert to fraction form
    21,067.12/31,576.36 = 7,911.08/x
  3. Step 3: Cross multiply
    21,067.12x = 31,576.36 × 7,911.08
  4. Step 4: Simplify right side
    21,067.12x = 249,803,110.07
  5. Step 5: Solve for x
    x = 249,803,110.07/21,067.12
  6. Step 6: Final answer
    x = 11,857.49

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1.5x scale

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.