Home / 20,719.26-31,078.62-5,137.02

Finding the Fourth Proportional to 20,719.26, 31,078.62 and 5,137.02

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Solution

The fourth proportional to 20,719.26, 31,078.62 and 5,137.02 is: 7,705.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,719.26 : 31,078.62 = 5,137.02 : x
  2. Step 2: Convert to fraction form
    20,719.26/31,078.62 = 5,137.02/x
  3. Step 3: Cross multiply
    20,719.26x = 31,078.62 × 5,137.02
  4. Step 4: Simplify right side
    20,719.26x = 159,651,492.51
  5. Step 5: Solve for x
    x = 159,651,492.51/20,719.26
  6. Step 6: Final answer
    x = 7,705.46

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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.