Home / 13,851.76-20,782.50-8,651.56

Finding the Fourth Proportional to 13,851.76, 20,782.50 and 8,651.56

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Solution

The fourth proportional to 13,851.76, 20,782.50 and 8,651.56 is: 12,980.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,851.76 : 20,782.50 = 8,651.56 : x
  2. Step 2: Convert to fraction form
    13,851.76/20,782.50 = 8,651.56/x
  3. Step 3: Cross multiply
    13,851.76x = 20,782.50 × 8,651.56
  4. Step 4: Simplify right side
    13,851.76x = 179,801,045.70
  5. Step 5: Solve for x
    x = 179,801,045.70/13,851.76
  6. Step 6: Final answer
    x = 12,980.38

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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.