Home / 19,855.82-27,397.22-12,689.48

Finding the Fourth Proportional to 19,855.82, 27,397.22 and 12,689.48

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Solution

The fourth proportional to 19,855.82, 27,397.22 and 12,689.48 is: 17,509.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.82 : 27,397.22 = 12,689.48 : x
  2. Step 2: Convert to fraction form
    19,855.82/27,397.22 = 12,689.48/x
  3. Step 3: Cross multiply
    19,855.82x = 27,397.22 × 12,689.48
  4. Step 4: Simplify right side
    19,855.82x = 347,656,475.25
  5. Step 5: Solve for x
    x = 347,656,475.25/19,855.82
  6. Step 6: Final answer
    x = 17,509.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.