Home / 13,433.85-20,126.61-12,643.20

Finding the Fourth Proportional to 13,433.85, 20,126.61 and 12,643.20

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Solution

The fourth proportional to 13,433.85, 20,126.61 and 12,643.20 is: 18,942.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,433.85 : 20,126.61 = 12,643.20 : x
  2. Step 2: Convert to fraction form
    13,433.85/20,126.61 = 12,643.20/x
  3. Step 3: Cross multiply
    13,433.85x = 20,126.61 × 12,643.20
  4. Step 4: Simplify right side
    13,433.85x = 254,464,755.55
  5. Step 5: Solve for x
    x = 254,464,755.55/13,433.85
  6. Step 6: Final answer
    x = 18,942.06

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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.