Home / 15,679.09-21,637.20-8,605.90

Finding the Fourth Proportional to 15,679.09, 21,637.20 and 8,605.90

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Solution

The fourth proportional to 15,679.09, 21,637.20 and 8,605.90 is: 11,876.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.09 : 21,637.20 = 8,605.90 : x
  2. Step 2: Convert to fraction form
    15,679.09/21,637.20 = 8,605.90/x
  3. Step 3: Cross multiply
    15,679.09x = 21,637.20 × 8,605.90
  4. Step 4: Simplify right side
    15,679.09x = 186,207,579.48
  5. Step 5: Solve for x
    x = 186,207,579.48/15,679.09
  6. Step 6: Final answer
    x = 11,876.17

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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.