Home / 12,147.20-18,231.60-10,397.60

Finding the Fourth Proportional to 12,147.20, 18,231.60 and 10,397.60

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Solution

The fourth proportional to 12,147.20, 18,231.60 and 10,397.60 is: 15,605.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.20 : 18,231.60 = 10,397.60 : x
  2. Step 2: Convert to fraction form
    12,147.20/18,231.60 = 10,397.60/x
  3. Step 3: Cross multiply
    12,147.20x = 18,231.60 × 10,397.60
  4. Step 4: Simplify right side
    12,147.20x = 189,564,884.16
  5. Step 5: Solve for x
    x = 189,564,884.16/12,147.20
  6. Step 6: Final answer
    x = 15,605.64

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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.