Home / 30,177.72-45,268.92-7,990.56

Finding the Fourth Proportional to 30,177.72, 45,268.92 and 7,990.56

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Solution

The fourth proportional to 30,177.72, 45,268.92 and 7,990.56 is: 11,986.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,177.72 : 45,268.92 = 7,990.56 : x
  2. Step 2: Convert to fraction form
    30,177.72/45,268.92 = 7,990.56/x
  3. Step 3: Cross multiply
    30,177.72x = 45,268.92 × 7,990.56
  4. Step 4: Simplify right side
    30,177.72x = 361,724,021.40
  5. Step 5: Solve for x
    x = 361,724,021.40/30,177.72
  6. Step 6: Final answer
    x = 11,986.46

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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.