Home / 12,679.29-19,021.47-3,913.89

Finding the Fourth Proportional to 12,679.29, 19,021.47 and 3,913.89

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Solution

The fourth proportional to 12,679.29, 19,021.47 and 3,913.89 is: 5,871.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.29 : 19,021.47 = 3,913.89 : x
  2. Step 2: Convert to fraction form
    12,679.29/19,021.47 = 3,913.89/x
  3. Step 3: Cross multiply
    12,679.29x = 19,021.47 × 3,913.89
  4. Step 4: Simplify right side
    12,679.29x = 74,447,941.22
  5. Step 5: Solve for x
    x = 74,447,941.22/12,679.29
  6. Step 6: Final answer
    x = 5,871.62

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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.