Home / 13,720.05-20,577.67-3,856.98

Finding the Fourth Proportional to 13,720.05, 20,577.67 and 3,856.98

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Solution

The fourth proportional to 13,720.05, 20,577.67 and 3,856.98 is: 5,784.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.05 : 20,577.67 = 3,856.98 : x
  2. Step 2: Convert to fraction form
    13,720.05/20,577.67 = 3,856.98/x
  3. Step 3: Cross multiply
    13,720.05x = 20,577.67 × 3,856.98
  4. Step 4: Simplify right side
    13,720.05x = 79,367,656.82
  5. Step 5: Solve for x
    x = 79,367,656.82/13,720.05
  6. Step 6: Final answer
    x = 5,784.80

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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.