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Finding the Fourth Proportional to 14,544.88, 20,072.04 and 7,920.88

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Solution

The fourth proportional to 14,544.88, 20,072.04 and 7,920.88 is: 10,930.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,544.88 : 20,072.04 = 7,920.88 : x
  2. Step 2: Convert to fraction form
    14,544.88/20,072.04 = 7,920.88/x
  3. Step 3: Cross multiply
    14,544.88x = 20,072.04 × 7,920.88
  4. Step 4: Simplify right side
    14,544.88x = 158,988,220.20
  5. Step 5: Solve for x
    x = 158,988,220.20/14,544.88
  6. Step 6: Final answer
    x = 10,930.87

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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.