Home / 20,388.50-30,570.46-9,141.80

Finding the Fourth Proportional to 20,388.50, 30,570.46 and 9,141.80

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Solution

The fourth proportional to 20,388.50, 30,570.46 and 9,141.80 is: 13,707.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.50 : 30,570.46 = 9,141.80 : x
  2. Step 2: Convert to fraction form
    20,388.50/30,570.46 = 9,141.80/x
  3. Step 3: Cross multiply
    20,388.50x = 30,570.46 × 9,141.80
  4. Step 4: Simplify right side
    20,388.50x = 279,469,031.23
  5. Step 5: Solve for x
    x = 279,469,031.23/20,388.50
  6. Step 6: Final answer
    x = 13,707.19

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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.