Home / 20,666-31,111.48-18,828.92

Finding the Fourth Proportional to 20,666, 31,111.48 and 18,828.92

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Solution

The fourth proportional to 20,666, 31,111.48 and 18,828.92 is: 28,345.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666 : 31,111.48 = 18,828.92 : x
  2. Step 2: Convert to fraction form
    20,666/31,111.48 = 18,828.92/x
  3. Step 3: Cross multiply
    20,666x = 31,111.48 × 18,828.92
  4. Step 4: Simplify right side
    20,666x = 585,795,568.00
  5. Step 5: Solve for x
    x = 585,795,568.00/20,666
  6. Step 6: Final answer
    x = 28,345.86

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.