Home / 20,469.09-30,720.05-10,611.20

Finding the Fourth Proportional to 20,469.09, 30,720.05 and 10,611.20

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Solution

The fourth proportional to 20,469.09, 30,720.05 and 10,611.20 is: 15,925.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,469.09 : 30,720.05 = 10,611.20 : x
  2. Step 2: Convert to fraction form
    20,469.09/30,720.05 = 10,611.20/x
  3. Step 3: Cross multiply
    20,469.09x = 30,720.05 × 10,611.20
  4. Step 4: Simplify right side
    20,469.09x = 325,976,387.90
  5. Step 5: Solve for x
    x = 325,976,387.90/20,469.09
  6. Step 6: Final answer
    x = 15,925.30

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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.