Home / 12,686.88-19,020.80-3,916.64

Finding the Fourth Proportional to 12,686.88, 19,020.80 and 3,916.64

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Solution

The fourth proportional to 12,686.88, 19,020.80 and 3,916.64 is: 5,872.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.88 : 19,020.80 = 3,916.64 : x
  2. Step 2: Convert to fraction form
    12,686.88/19,020.80 = 3,916.64/x
  3. Step 3: Cross multiply
    12,686.88x = 19,020.80 × 3,916.64
  4. Step 4: Simplify right side
    12,686.88x = 74,497,626.11
  5. Step 5: Solve for x
    x = 74,497,626.11/12,686.88
  6. Step 6: Final answer
    x = 5,872.02

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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.