Home / 20,719.89-31,080.06-11,354.81

Finding the Fourth Proportional to 20,719.89, 31,080.06 and 11,354.81

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Solution

The fourth proportional to 20,719.89, 31,080.06 and 11,354.81 is: 17,032.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.89 : 31,080.06 = 11,354.81 : x
  2. Step 2: Convert to fraction form
    20,719.89/31,080.06 = 11,354.81/x
  3. Step 3: Cross multiply
    20,719.89x = 31,080.06 × 11,354.81
  4. Step 4: Simplify right side
    20,719.89x = 352,908,094.66
  5. Step 5: Solve for x
    x = 352,908,094.66/20,719.89
  6. Step 6: Final answer
    x = 17,032.33

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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.