Home / 19,918.78-27,470.19-15,719.74

Finding the Fourth Proportional to 19,918.78, 27,470.19 and 15,719.74

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Solution

The fourth proportional to 19,918.78, 27,470.19 and 15,719.74 is: 21,679.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,918.78 : 27,470.19 = 15,719.74 : x
  2. Step 2: Convert to fraction form
    19,918.78/27,470.19 = 15,719.74/x
  3. Step 3: Cross multiply
    19,918.78x = 27,470.19 × 15,719.74
  4. Step 4: Simplify right side
    19,918.78x = 431,824,244.55
  5. Step 5: Solve for x
    x = 431,824,244.55/19,918.78
  6. Step 6: Final answer
    x = 21,679.25

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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.