Home / 20,720.40-31,091.40-9,034.80

Finding the Fourth Proportional to 20,720.40, 31,091.40 and 9,034.80

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Solution

The fourth proportional to 20,720.40, 31,091.40 and 9,034.80 is: 13,556.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.40 : 31,091.40 = 9,034.80 : x
  2. Step 2: Convert to fraction form
    20,720.40/31,091.40 = 9,034.80/x
  3. Step 3: Cross multiply
    20,720.40x = 31,091.40 × 9,034.80
  4. Step 4: Simplify right side
    20,720.40x = 280,904,580.72
  5. Step 5: Solve for x
    x = 280,904,580.72/20,720.40
  6. Step 6: Final answer
    x = 13,556.91

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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.