Home / 21,127.30-31,679.31-14,471.43

Finding the Fourth Proportional to 21,127.30, 31,679.31 and 14,471.43

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Solution

The fourth proportional to 21,127.30, 31,679.31 and 14,471.43 is: 21,699.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.30 : 31,679.31 = 14,471.43 : x
  2. Step 2: Convert to fraction form
    21,127.30/31,679.31 = 14,471.43/x
  3. Step 3: Cross multiply
    21,127.30x = 31,679.31 × 14,471.43
  4. Step 4: Simplify right side
    21,127.30x = 458,444,917.11
  5. Step 5: Solve for x
    x = 458,444,917.11/21,127.30
  6. Step 6: Final answer
    x = 21,699.17

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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.