Home / 13,638.94-20,458.85-3,777.38

Finding the Fourth Proportional to 13,638.94, 20,458.85 and 3,777.38

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Solution

The fourth proportional to 13,638.94, 20,458.85 and 3,777.38 is: 5,666.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.94 : 20,458.85 = 3,777.38 : x
  2. Step 2: Convert to fraction form
    13,638.94/20,458.85 = 3,777.38/x
  3. Step 3: Cross multiply
    13,638.94x = 20,458.85 × 3,777.38
  4. Step 4: Simplify right side
    13,638.94x = 77,280,850.81
  5. Step 5: Solve for x
    x = 77,280,850.81/13,638.94
  6. Step 6: Final answer
    x = 5,666.19

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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.