Home / 13,621.89-20,431.29-3,762.57

Finding the Fourth Proportional to 13,621.89, 20,431.29 and 3,762.57

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Solution

The fourth proportional to 13,621.89, 20,431.29 and 3,762.57 is: 5,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.89 : 20,431.29 = 3,762.57 : x
  2. Step 2: Convert to fraction form
    13,621.89/20,431.29 = 3,762.57/x
  3. Step 3: Cross multiply
    13,621.89x = 20,431.29 × 3,762.57
  4. Step 4: Simplify right side
    13,621.89x = 76,874,158.82
  5. Step 5: Solve for x
    x = 76,874,158.82/13,621.89
  6. Step 6: Final answer
    x = 5,643.43

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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.