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Finding the Fourth Proportional to 17,628.40, 26,442.60 and 17,321.20

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Solution

The fourth proportional to 17,628.40, 26,442.60 and 17,321.20 is: 25,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,628.40 : 26,442.60 = 17,321.20 : x
  2. Step 2: Convert to fraction form
    17,628.40/26,442.60 = 17,321.20/x
  3. Step 3: Cross multiply
    17,628.40x = 26,442.60 × 17,321.20
  4. Step 4: Simplify right side
    17,628.40x = 458,017,563.12
  5. Step 5: Solve for x
    x = 458,017,563.12/17,628.40
  6. Step 6: Final answer
    x = 25,981.80

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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.