Home / 21,014.94-31,429.47-18,691.26

Finding the Fourth Proportional to 21,014.94, 31,429.47 and 18,691.26

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Solution

The fourth proportional to 21,014.94, 31,429.47 and 18,691.26 is: 27,954.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,014.94 : 31,429.47 = 18,691.26 : x
  2. Step 2: Convert to fraction form
    21,014.94/31,429.47 = 18,691.26/x
  3. Step 3: Cross multiply
    21,014.94x = 31,429.47 × 18,691.26
  4. Step 4: Simplify right side
    21,014.94x = 587,456,242.53
  5. Step 5: Solve for x
    x = 587,456,242.53/21,014.94
  6. Step 6: Final answer
    x = 27,954.21

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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.