Home / 21,456.41-29,599.31-18,619.80

Finding the Fourth Proportional to 21,456.41, 29,599.31 and 18,619.80

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Solution

The fourth proportional to 21,456.41, 29,599.31 and 18,619.80 is: 25,686.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.41 : 29,599.31 = 18,619.80 : x
  2. Step 2: Convert to fraction form
    21,456.41/29,599.31 = 18,619.80/x
  3. Step 3: Cross multiply
    21,456.41x = 29,599.31 × 18,619.80
  4. Step 4: Simplify right side
    21,456.41x = 551,133,167.89
  5. Step 5: Solve for x
    x = 551,133,167.89/21,456.41
  6. Step 6: Final answer
    x = 25,686.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.