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Finding the Fourth Proportional to 20,563.40, 30,801.90 and 17,107.40

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Solution

The fourth proportional to 20,563.40, 30,801.90 and 17,107.40 is: 25,625.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.40 : 30,801.90 = 17,107.40 : x
  2. Step 2: Convert to fraction form
    20,563.40/30,801.90 = 17,107.40/x
  3. Step 3: Cross multiply
    20,563.40x = 30,801.90 × 17,107.40
  4. Step 4: Simplify right side
    20,563.40x = 526,940,424.06
  5. Step 5: Solve for x
    x = 526,940,424.06/20,563.40
  6. Step 6: Final answer
    x = 25,625.16

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1.5x scale

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.