Home / 21,074.78-31,605.42-11,719.28

Finding the Fourth Proportional to 21,074.78, 31,605.42 and 11,719.28

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Solution

The fourth proportional to 21,074.78, 31,605.42 and 11,719.28 is: 17,575.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.78 : 31,605.42 = 11,719.28 : x
  2. Step 2: Convert to fraction form
    21,074.78/31,605.42 = 11,719.28/x
  3. Step 3: Cross multiply
    21,074.78x = 31,605.42 × 11,719.28
  4. Step 4: Simplify right side
    21,074.78x = 370,392,766.50
  5. Step 5: Solve for x
    x = 370,392,766.50/21,074.78
  6. Step 6: Final answer
    x = 17,575.17

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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.