Home / 12,107.20-18,160.80-7,711.60

Finding the Fourth Proportional to 12,107.20, 18,160.80 and 7,711.60

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Solution

The fourth proportional to 12,107.20, 18,160.80 and 7,711.60 is: 11,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,107.20 : 18,160.80 = 7,711.60 : x
  2. Step 2: Convert to fraction form
    12,107.20/18,160.80 = 7,711.60/x
  3. Step 3: Cross multiply
    12,107.20x = 18,160.80 × 7,711.60
  4. Step 4: Simplify right side
    12,107.20x = 140,048,825.28
  5. Step 5: Solve for x
    x = 140,048,825.28/12,107.20
  6. Step 6: Final answer
    x = 11,567.40

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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.