Home / 19,890.68-29,844.13-12,782.88

Finding the Fourth Proportional to 19,890.68, 29,844.13 and 12,782.88

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Solution

The fourth proportional to 19,890.68, 29,844.13 and 12,782.88 is: 19,179.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.68 : 29,844.13 = 12,782.88 : x
  2. Step 2: Convert to fraction form
    19,890.68/29,844.13 = 12,782.88/x
  3. Step 3: Cross multiply
    19,890.68x = 29,844.13 × 12,782.88
  4. Step 4: Simplify right side
    19,890.68x = 381,493,924.51
  5. Step 5: Solve for x
    x = 381,493,924.51/19,890.68
  6. Step 6: Final answer
    x = 19,179.53

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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.