Home / 20,345.12-30,371.08-17,720

Finding the Fourth Proportional to 20,345.12, 30,371.08 and 17,720

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Solution

The fourth proportional to 20,345.12, 30,371.08 and 17,720 is: 26,452.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.12 : 30,371.08 = 17,720 : x
  2. Step 2: Convert to fraction form
    20,345.12/30,371.08 = 17,720/x
  3. Step 3: Cross multiply
    20,345.12x = 30,371.08 × 17,720
  4. Step 4: Simplify right side
    20,345.12x = 538,175,537.60
  5. Step 5: Solve for x
    x = 538,175,537.60/20,345.12
  6. Step 6: Final answer
    x = 26,452.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.