Home / 20,851.28-31,279.80-7,004.24

Finding the Fourth Proportional to 20,851.28, 31,279.80 and 7,004.24

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Solution

The fourth proportional to 20,851.28, 31,279.80 and 7,004.24 is: 10,507.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.28 : 31,279.80 = 7,004.24 : x
  2. Step 2: Convert to fraction form
    20,851.28/31,279.80 = 7,004.24/x
  3. Step 3: Cross multiply
    20,851.28x = 31,279.80 × 7,004.24
  4. Step 4: Simplify right side
    20,851.28x = 219,091,226.35
  5. Step 5: Solve for x
    x = 219,091,226.35/20,851.28
  6. Step 6: Final answer
    x = 10,507.33

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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.