Home / 20,857.20-31,245.48-11,595.12

Finding the Fourth Proportional to 20,857.20, 31,245.48 and 11,595.12

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Solution

The fourth proportional to 20,857.20, 31,245.48 and 11,595.12 is: 17,370.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.20 : 31,245.48 = 11,595.12 : x
  2. Step 2: Convert to fraction form
    20,857.20/31,245.48 = 11,595.12/x
  3. Step 3: Cross multiply
    20,857.20x = 31,245.48 × 11,595.12
  4. Step 4: Simplify right side
    20,857.20x = 362,295,090.06
  5. Step 5: Solve for x
    x = 362,295,090.06/20,857.20
  6. Step 6: Final answer
    x = 17,370.26

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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.