Home / 19,857.66-29,787.24-9,991.56

Finding the Fourth Proportional to 19,857.66, 29,787.24 and 9,991.56

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Solution

The fourth proportional to 19,857.66, 29,787.24 and 9,991.56 is: 14,987.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,857.66 : 29,787.24 = 9,991.56 : x
  2. Step 2: Convert to fraction form
    19,857.66/29,787.24 = 9,991.56/x
  3. Step 3: Cross multiply
    19,857.66x = 29,787.24 × 9,991.56
  4. Step 4: Simplify right side
    19,857.66x = 297,620,995.69
  5. Step 5: Solve for x
    x = 297,620,995.69/19,857.66
  6. Step 6: Final answer
    x = 14,987.72

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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.