Home / 21,972.24-30,310.47-13,356.09

Finding the Fourth Proportional to 21,972.24, 30,310.47 and 13,356.09

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Solution

The fourth proportional to 21,972.24, 30,310.47 and 13,356.09 is: 18,424.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,972.24 : 30,310.47 = 13,356.09 : x
  2. Step 2: Convert to fraction form
    21,972.24/30,310.47 = 13,356.09/x
  3. Step 3: Cross multiply
    21,972.24x = 30,310.47 × 13,356.09
  4. Step 4: Simplify right side
    21,972.24x = 404,829,365.26
  5. Step 5: Solve for x
    x = 404,829,365.26/21,972.24
  6. Step 6: Final answer
    x = 18,424.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.