Home / 21,307.71-31,933.77-11,435.43

Finding the Fourth Proportional to 21,307.71, 31,933.77 and 11,435.43

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Solution

The fourth proportional to 21,307.71, 31,933.77 and 11,435.43 is: 17,138.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,307.71 : 31,933.77 = 11,435.43 : x
  2. Step 2: Convert to fraction form
    21,307.71/31,933.77 = 11,435.43/x
  3. Step 3: Cross multiply
    21,307.71x = 31,933.77 × 11,435.43
  4. Step 4: Simplify right side
    21,307.71x = 365,176,391.47
  5. Step 5: Solve for x
    x = 365,176,391.47/21,307.71
  6. Step 6: Final answer
    x = 17,138.23

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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.