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Finding the Fourth Proportional to 13,718.88, 20,578.17 and 3,330.63

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Solution

The fourth proportional to 13,718.88, 20,578.17 and 3,330.63 is: 4,995.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,718.88 : 20,578.17 = 3,330.63 : x
  2. Step 2: Convert to fraction form
    13,718.88/20,578.17 = 3,330.63/x
  3. Step 3: Cross multiply
    13,718.88x = 20,578.17 × 3,330.63
  4. Step 4: Simplify right side
    13,718.88x = 68,538,270.35
  5. Step 5: Solve for x
    x = 68,538,270.35/13,718.88
  6. Step 6: Final answer
    x = 4,995.91

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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.