Home / 12,765.20-19,147.80-8,387.60

Finding the Fourth Proportional to 12,765.20, 19,147.80 and 8,387.60

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Solution

The fourth proportional to 12,765.20, 19,147.80 and 8,387.60 is: 12,581.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,765.20 : 19,147.80 = 8,387.60 : x
  2. Step 2: Convert to fraction form
    12,765.20/19,147.80 = 8,387.60/x
  3. Step 3: Cross multiply
    12,765.20x = 19,147.80 × 8,387.60
  4. Step 4: Simplify right side
    12,765.20x = 160,604,087.28
  5. Step 5: Solve for x
    x = 160,604,087.28/12,765.20
  6. Step 6: Final answer
    x = 12,581.40

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Similar ratio
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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.