Home / 12,660.20-19,007.40-7,400.60

Finding the Fourth Proportional to 12,660.20, 19,007.40 and 7,400.60

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Solution

The fourth proportional to 12,660.20, 19,007.40 and 7,400.60 is: 11,110.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,660.20 : 19,007.40 = 7,400.60 : x
  2. Step 2: Convert to fraction form
    12,660.20/19,007.40 = 7,400.60/x
  3. Step 3: Cross multiply
    12,660.20x = 19,007.40 × 7,400.60
  4. Step 4: Simplify right side
    12,660.20x = 140,666,164.44
  5. Step 5: Solve for x
    x = 140,666,164.44/12,660.20
  6. Step 6: Final answer
    x = 11,110.90

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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.