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Finding the Fourth Proportional to 13,959.20, 20,906.40 and 9,552.80

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Solution

The fourth proportional to 13,959.20, 20,906.40 and 9,552.80 is: 14,307.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.20 : 20,906.40 = 9,552.80 : x
  2. Step 2: Convert to fraction form
    13,959.20/20,906.40 = 9,552.80/x
  3. Step 3: Cross multiply
    13,959.20x = 20,906.40 × 9,552.80
  4. Step 4: Simplify right side
    13,959.20x = 199,714,657.92
  5. Step 5: Solve for x
    x = 199,714,657.92/13,959.20
  6. Step 6: Final answer
    x = 14,307.03

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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.