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Finding the Fourth Proportional to 15,163.20, 20,800.80 and 14,968.80

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Solution

The fourth proportional to 15,163.20, 20,800.80 and 14,968.80 is: 20,534.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.20 : 20,800.80 = 14,968.80 : x
  2. Step 2: Convert to fraction form
    15,163.20/20,800.80 = 14,968.80/x
  3. Step 3: Cross multiply
    15,163.20x = 20,800.80 × 14,968.80
  4. Step 4: Simplify right side
    15,163.20x = 311,363,015.04
  5. Step 5: Solve for x
    x = 311,363,015.04/15,163.20
  6. Step 6: Final answer
    x = 20,534.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.