Home / 13,686.52-20,515.41-7,756.03

Finding the Fourth Proportional to 13,686.52, 20,515.41 and 7,756.03

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Solution

The fourth proportional to 13,686.52, 20,515.41 and 7,756.03 is: 11,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,686.52 : 20,515.41 = 7,756.03 : x
  2. Step 2: Convert to fraction form
    13,686.52/20,515.41 = 7,756.03/x
  3. Step 3: Cross multiply
    13,686.52x = 20,515.41 × 7,756.03
  4. Step 4: Simplify right side
    13,686.52x = 159,118,135.42
  5. Step 5: Solve for x
    x = 159,118,135.42/13,686.52
  6. Step 6: Final answer
    x = 11,625.90

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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.