Home / 28,254.56-38,983.41-20,190.65

Finding the Fourth Proportional to 28,254.56, 38,983.41 and 20,190.65

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Solution

The fourth proportional to 28,254.56, 38,983.41 and 20,190.65 is: 27,857.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,254.56 : 38,983.41 = 20,190.65 : x
  2. Step 2: Convert to fraction form
    28,254.56/38,983.41 = 20,190.65/x
  3. Step 3: Cross multiply
    28,254.56x = 38,983.41 × 20,190.65
  4. Step 4: Simplify right side
    28,254.56x = 787,100,192.20
  5. Step 5: Solve for x
    x = 787,100,192.20/28,254.56
  6. Step 6: Final answer
    x = 27,857.46

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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.