Home / 20,389.36-30,578.28-7,234.60

Finding the Fourth Proportional to 20,389.36, 30,578.28 and 7,234.60

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Solution

The fourth proportional to 20,389.36, 30,578.28 and 7,234.60 is: 10,849.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,389.36 : 30,578.28 = 7,234.60 : x
  2. Step 2: Convert to fraction form
    20,389.36/30,578.28 = 7,234.60/x
  3. Step 3: Cross multiply
    20,389.36x = 30,578.28 × 7,234.60
  4. Step 4: Simplify right side
    20,389.36x = 221,221,624.49
  5. Step 5: Solve for x
    x = 221,221,624.49/20,389.36
  6. Step 6: Final answer
    x = 10,849.86

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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.