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Finding the Fourth Proportional to 17,721.60, 26,570.08 and 7,855.52

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Solution

The fourth proportional to 17,721.60, 26,570.08 and 7,855.52 is: 11,777.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,721.60 : 26,570.08 = 7,855.52 : x
  2. Step 2: Convert to fraction form
    17,721.60/26,570.08 = 7,855.52/x
  3. Step 3: Cross multiply
    17,721.60x = 26,570.08 × 7,855.52
  4. Step 4: Simplify right side
    17,721.60x = 208,721,794.84
  5. Step 5: Solve for x
    x = 208,721,794.84/17,721.60
  6. Step 6: Final answer
    x = 11,777.82

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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.