Home / 13,558.44-20,281.50-12,729

Finding the Fourth Proportional to 13,558.44, 20,281.50 and 12,729

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Solution

The fourth proportional to 13,558.44, 20,281.50 and 12,729 is: 19,040.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,558.44 : 20,281.50 = 12,729 : x
  2. Step 2: Convert to fraction form
    13,558.44/20,281.50 = 12,729/x
  3. Step 3: Cross multiply
    13,558.44x = 20,281.50 × 12,729
  4. Step 4: Simplify right side
    13,558.44x = 258,163,213.50
  5. Step 5: Solve for x
    x = 258,163,213.50/13,558.44
  6. Step 6: Final answer
    x = 19,040.78

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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.