Home / 20,632.70-28,408.38-18,207.56

Finding the Fourth Proportional to 20,632.70, 28,408.38 and 18,207.56

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Solution

The fourth proportional to 20,632.70, 28,408.38 and 18,207.56 is: 25,069.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,632.70 : 28,408.38 = 18,207.56 : x
  2. Step 2: Convert to fraction form
    20,632.70/28,408.38 = 18,207.56/x
  3. Step 3: Cross multiply
    20,632.70x = 28,408.38 × 18,207.56
  4. Step 4: Simplify right side
    20,632.70x = 517,247,283.35
  5. Step 5: Solve for x
    x = 517,247,283.35/20,632.70
  6. Step 6: Final answer
    x = 25,069.30

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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.