Home / 21,151.24-31,705.49-13,259.29

Finding the Fourth Proportional to 21,151.24, 31,705.49 and 13,259.29

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Solution

The fourth proportional to 21,151.24, 31,705.49 and 13,259.29 is: 19,875.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.24 : 31,705.49 = 13,259.29 : x
  2. Step 2: Convert to fraction form
    21,151.24/31,705.49 = 13,259.29/x
  3. Step 3: Cross multiply
    21,151.24x = 31,705.49 × 13,259.29
  4. Step 4: Simplify right side
    21,151.24x = 420,392,127.97
  5. Step 5: Solve for x
    x = 420,392,127.97/21,151.24
  6. Step 6: Final answer
    x = 19,875.54

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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.