Home / 13,720.11-20,577.76-3,857.05

Finding the Fourth Proportional to 13,720.11, 20,577.76 and 3,857.05

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Solution

The fourth proportional to 13,720.11, 20,577.76 and 3,857.05 is: 5,784.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.11 : 20,577.76 = 3,857.05 : x
  2. Step 2: Convert to fraction form
    13,720.11/20,577.76 = 3,857.05/x
  3. Step 3: Cross multiply
    13,720.11x = 20,577.76 × 3,857.05
  4. Step 4: Simplify right side
    13,720.11x = 79,369,346.32
  5. Step 5: Solve for x
    x = 79,369,346.32/13,720.11
  6. Step 6: Final answer
    x = 5,784.89

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1.5x scale

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.