Home / 21,209.90-31,766.40-10,124.39

Finding the Fourth Proportional to 21,209.90, 31,766.40 and 10,124.39

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Solution

The fourth proportional to 21,209.90, 31,766.40 and 10,124.39 is: 15,163.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.90 : 31,766.40 = 10,124.39 : x
  2. Step 2: Convert to fraction form
    21,209.90/31,766.40 = 10,124.39/x
  3. Step 3: Cross multiply
    21,209.90x = 31,766.40 × 10,124.39
  4. Step 4: Simplify right side
    21,209.90x = 321,615,371.87
  5. Step 5: Solve for x
    x = 321,615,371.87/21,209.90
  6. Step 6: Final answer
    x = 15,163.46

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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.