Home / 21,272.31-31,877.07-18,936.77

Finding the Fourth Proportional to 21,272.31, 31,877.07 and 18,936.77

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Solution

The fourth proportional to 21,272.31, 31,877.07 and 18,936.77 is: 28,377.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.31 : 31,877.07 = 18,936.77 : x
  2. Step 2: Convert to fraction form
    21,272.31/31,877.07 = 18,936.77/x
  3. Step 3: Cross multiply
    21,272.31x = 31,877.07 × 18,936.77
  4. Step 4: Simplify right side
    21,272.31x = 603,648,583.48
  5. Step 5: Solve for x
    x = 603,648,583.48/21,272.31
  6. Step 6: Final answer
    x = 28,377.20

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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.