Home / 18,820.56-28,230.30-7,724.10

Finding the Fourth Proportional to 18,820.56, 28,230.30 and 7,724.10

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Solution

The fourth proportional to 18,820.56, 28,230.30 and 7,724.10 is: 11,585.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.56 : 28,230.30 = 7,724.10 : x
  2. Step 2: Convert to fraction form
    18,820.56/28,230.30 = 7,724.10/x
  3. Step 3: Cross multiply
    18,820.56x = 28,230.30 × 7,724.10
  4. Step 4: Simplify right side
    18,820.56x = 218,053,660.23
  5. Step 5: Solve for x
    x = 218,053,660.23/18,820.56
  6. Step 6: Final answer
    x = 11,585.93

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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.