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Finding the Fourth Proportional to 19,987.80, 29,949.30 and 17,201.40

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Solution

The fourth proportional to 19,987.80, 29,949.30 and 17,201.40 is: 25,774.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.80 : 29,949.30 = 17,201.40 : x
  2. Step 2: Convert to fraction form
    19,987.80/29,949.30 = 17,201.40/x
  3. Step 3: Cross multiply
    19,987.80x = 29,949.30 × 17,201.40
  4. Step 4: Simplify right side
    19,987.80x = 515,169,889.02
  5. Step 5: Solve for x
    x = 515,169,889.02/19,987.80
  6. Step 6: Final answer
    x = 25,774.22

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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.