Home / 20,720.60-31,059.30-11,346.20

Finding the Fourth Proportional to 20,720.60, 31,059.30 and 11,346.20

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Solution

The fourth proportional to 20,720.60, 31,059.30 and 11,346.20 is: 17,007.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.60 : 31,059.30 = 11,346.20 : x
  2. Step 2: Convert to fraction form
    20,720.60/31,059.30 = 11,346.20/x
  3. Step 3: Cross multiply
    20,720.60x = 31,059.30 × 11,346.20
  4. Step 4: Simplify right side
    20,720.60x = 352,405,029.66
  5. Step 5: Solve for x
    x = 352,405,029.66/20,720.60
  6. Step 6: Final answer
    x = 17,007.47

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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.