Home / 28,018.80-38,640.42-18,570.96

Finding the Fourth Proportional to 28,018.80, 38,640.42 and 18,570.96

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Solution

The fourth proportional to 28,018.80, 38,640.42 and 18,570.96 is: 25,611.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.80 : 38,640.42 = 18,570.96 : x
  2. Step 2: Convert to fraction form
    28,018.80/38,640.42 = 18,570.96/x
  3. Step 3: Cross multiply
    28,018.80x = 38,640.42 × 18,570.96
  4. Step 4: Simplify right side
    28,018.80x = 717,589,694.20
  5. Step 5: Solve for x
    x = 717,589,694.20/28,018.80
  6. Step 6: Final answer
    x = 25,611.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.