Home / 21,022.88-31,512.40-7,869.52

Finding the Fourth Proportional to 21,022.88, 31,512.40 and 7,869.52

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Solution

The fourth proportional to 21,022.88, 31,512.40 and 7,869.52 is: 11,796.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.88 : 31,512.40 = 7,869.52 : x
  2. Step 2: Convert to fraction form
    21,022.88/31,512.40 = 7,869.52/x
  3. Step 3: Cross multiply
    21,022.88x = 31,512.40 × 7,869.52
  4. Step 4: Simplify right side
    21,022.88x = 247,987,462.05
  5. Step 5: Solve for x
    x = 247,987,462.05/21,022.88
  6. Step 6: Final answer
    x = 11,796.07

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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.