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Finding the Fourth Proportional to 19,679.80, 29,519.70 and 17,735.80

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Solution

The fourth proportional to 19,679.80, 29,519.70 and 17,735.80 is: 26,603.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,679.80 : 29,519.70 = 17,735.80 : x
  2. Step 2: Convert to fraction form
    19,679.80/29,519.70 = 17,735.80/x
  3. Step 3: Cross multiply
    19,679.80x = 29,519.70 × 17,735.80
  4. Step 4: Simplify right side
    19,679.80x = 523,555,495.26
  5. Step 5: Solve for x
    x = 523,555,495.26/19,679.80
  6. Step 6: Final answer
    x = 26,603.70

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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.