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Finding the Fourth Proportional to 19,857.52, 29,787.04 and 9,991.44

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Solution

The fourth proportional to 19,857.52, 29,787.04 and 9,991.44 is: 14,987.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.52 : 29,787.04 = 9,991.44 : x
  2. Step 2: Convert to fraction form
    19,857.52/29,787.04 = 9,991.44/x
  3. Step 3: Cross multiply
    19,857.52x = 29,787.04 × 9,991.44
  4. Step 4: Simplify right side
    19,857.52x = 297,615,422.94
  5. Step 5: Solve for x
    x = 297,615,422.94/19,857.52
  6. Step 6: Final answer
    x = 14,987.54

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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.