Home / 21,127.43-31,689.33-12,804.99

Finding the Fourth Proportional to 21,127.43, 31,689.33 and 12,804.99

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Solution

The fourth proportional to 21,127.43, 31,689.33 and 12,804.99 is: 19,206.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.43 : 31,689.33 = 12,804.99 : x
  2. Step 2: Convert to fraction form
    21,127.43/31,689.33 = 12,804.99/x
  3. Step 3: Cross multiply
    21,127.43x = 31,689.33 × 12,804.99
  4. Step 4: Simplify right side
    21,127.43x = 405,781,386.90
  5. Step 5: Solve for x
    x = 405,781,386.90/21,127.43
  6. Step 6: Final answer
    x = 19,206.37

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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.