Home / 18,812.08-28,221.40-7,724.80

Finding the Fourth Proportional to 18,812.08, 28,221.40 and 7,724.80

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Solution

The fourth proportional to 18,812.08, 28,221.40 and 7,724.80 is: 11,588.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,812.08 : 28,221.40 = 7,724.80 : x
  2. Step 2: Convert to fraction form
    18,812.08/28,221.40 = 7,724.80/x
  3. Step 3: Cross multiply
    18,812.08x = 28,221.40 × 7,724.80
  4. Step 4: Simplify right side
    18,812.08x = 218,004,670.72
  5. Step 5: Solve for x
    x = 218,004,670.72/18,812.08
  6. Step 6: Final answer
    x = 11,588.55

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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.