Home / 15,014.27-20,721.75-8,640.73

Finding the Fourth Proportional to 15,014.27, 20,721.75 and 8,640.73

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Solution

The fourth proportional to 15,014.27, 20,721.75 and 8,640.73 is: 11,925.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.27 : 20,721.75 = 8,640.73 : x
  2. Step 2: Convert to fraction form
    15,014.27/20,721.75 = 8,640.73/x
  3. Step 3: Cross multiply
    15,014.27x = 20,721.75 × 8,640.73
  4. Step 4: Simplify right side
    15,014.27x = 179,051,046.88
  5. Step 5: Solve for x
    x = 179,051,046.88/15,014.27
  6. Step 6: Final answer
    x = 11,925.39

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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.