Home / 15,163.20-20,930.40-13,089.60

Finding the Fourth Proportional to 15,163.20, 20,930.40 and 13,089.60

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Solution

The fourth proportional to 15,163.20, 20,930.40 and 13,089.60 is: 18,068.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.20 : 20,930.40 = 13,089.60 : x
  2. Step 2: Convert to fraction form
    15,163.20/20,930.40 = 13,089.60/x
  3. Step 3: Cross multiply
    15,163.20x = 20,930.40 × 13,089.60
  4. Step 4: Simplify right side
    15,163.20x = 273,970,563.84
  5. Step 5: Solve for x
    x = 273,970,563.84/15,163.20
  6. Step 6: Final answer
    x = 18,068.12

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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.