Home / 20,270.46-30,408.74-7,120.52

Finding the Fourth Proportional to 20,270.46, 30,408.74 and 7,120.52

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Solution

The fourth proportional to 20,270.46, 30,408.74 and 7,120.52 is: 10,681.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,270.46 : 30,408.74 = 7,120.52 : x
  2. Step 2: Convert to fraction form
    20,270.46/30,408.74 = 7,120.52/x
  3. Step 3: Cross multiply
    20,270.46x = 30,408.74 × 7,120.52
  4. Step 4: Simplify right side
    20,270.46x = 216,525,853.70
  5. Step 5: Solve for x
    x = 216,525,853.70/20,270.46
  6. Step 6: Final answer
    x = 10,681.84

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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.