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Finding the Fourth Proportional to 19,939.60, 29,943.60 and 11,051.20

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Solution

The fourth proportional to 19,939.60, 29,943.60 and 11,051.20 is: 16,595.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.60 : 29,943.60 = 11,051.20 : x
  2. Step 2: Convert to fraction form
    19,939.60/29,943.60 = 11,051.20/x
  3. Step 3: Cross multiply
    19,939.60x = 29,943.60 × 11,051.20
  4. Step 4: Simplify right side
    19,939.60x = 330,912,712.32
  5. Step 5: Solve for x
    x = 330,912,712.32/19,939.60
  6. Step 6: Final answer
    x = 16,595.75

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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.