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Finding the Fourth Proportional to 17,701.20, 26,580.60 and 12,805.20

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Solution

The fourth proportional to 17,701.20, 26,580.60 and 12,805.20 is: 19,228.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,701.20 : 26,580.60 = 12,805.20 : x
  2. Step 2: Convert to fraction form
    17,701.20/26,580.60 = 12,805.20/x
  3. Step 3: Cross multiply
    17,701.20x = 26,580.60 × 12,805.20
  4. Step 4: Simplify right side
    17,701.20x = 340,369,899.12
  5. Step 5: Solve for x
    x = 340,369,899.12/17,701.20
  6. Step 6: Final answer
    x = 19,228.63

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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.