Home / 15,012.41-20,716.47-8,638.52

Finding the Fourth Proportional to 15,012.41, 20,716.47 and 8,638.52

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Solution

The fourth proportional to 15,012.41, 20,716.47 and 8,638.52 is: 11,920.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.41 : 20,716.47 = 8,638.52 : x
  2. Step 2: Convert to fraction form
    15,012.41/20,716.47 = 8,638.52/x
  3. Step 3: Cross multiply
    15,012.41x = 20,716.47 × 8,638.52
  4. Step 4: Simplify right side
    15,012.41x = 178,959,640.42
  5. Step 5: Solve for x
    x = 178,959,640.42/15,012.41
  6. Step 6: Final answer
    x = 11,920.78

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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.