Home / 13,511.70-20,261.06-6,390.02

Finding the Fourth Proportional to 13,511.70, 20,261.06 and 6,390.02

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Solution

The fourth proportional to 13,511.70, 20,261.06 and 6,390.02 is: 9,581.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.70 : 20,261.06 = 6,390.02 : x
  2. Step 2: Convert to fraction form
    13,511.70/20,261.06 = 6,390.02/x
  3. Step 3: Cross multiply
    13,511.70x = 20,261.06 × 6,390.02
  4. Step 4: Simplify right side
    13,511.70x = 129,468,578.62
  5. Step 5: Solve for x
    x = 129,468,578.62/13,511.70
  6. Step 6: Final answer
    x = 9,581.96

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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.