Home / 20,581.29-30,850.80-13,090.35

Finding the Fourth Proportional to 20,581.29, 30,850.80 and 13,090.35

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Solution

The fourth proportional to 20,581.29, 30,850.80 and 13,090.35 is: 19,622.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.29 : 30,850.80 = 13,090.35 : x
  2. Step 2: Convert to fraction form
    20,581.29/30,850.80 = 13,090.35/x
  3. Step 3: Cross multiply
    20,581.29x = 30,850.80 × 13,090.35
  4. Step 4: Simplify right side
    20,581.29x = 403,847,663.67
  5. Step 5: Solve for x
    x = 403,847,663.67/20,581.29
  6. Step 6: Final answer
    x = 19,622.07

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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.