Home / 20,286.91-30,430.37-9,889.75

Finding the Fourth Proportional to 20,286.91, 30,430.37 and 9,889.75

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Solution

The fourth proportional to 20,286.91, 30,430.37 and 9,889.75 is: 14,834.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.91 : 30,430.37 = 9,889.75 : x
  2. Step 2: Convert to fraction form
    20,286.91/30,430.37 = 9,889.75/x
  3. Step 3: Cross multiply
    20,286.91x = 30,430.37 × 9,889.75
  4. Step 4: Simplify right side
    20,286.91x = 300,948,751.71
  5. Step 5: Solve for x
    x = 300,948,751.71/20,286.91
  6. Step 6: Final answer
    x = 14,834.63

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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.