Home / 13,791.43-20,679.33-12,615.91

Finding the Fourth Proportional to 13,791.43, 20,679.33 and 12,615.91

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Solution

The fourth proportional to 13,791.43, 20,679.33 and 12,615.91 is: 18,916.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,791.43 : 20,679.33 = 12,615.91 : x
  2. Step 2: Convert to fraction form
    13,791.43/20,679.33 = 12,615.91/x
  3. Step 3: Cross multiply
    13,791.43x = 20,679.33 × 12,615.91
  4. Step 4: Simplify right side
    13,791.43x = 260,888,566.14
  5. Step 5: Solve for x
    x = 260,888,566.14/13,791.43
  6. Step 6: Final answer
    x = 18,916.72

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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.