Home / 18,219.45-25,138.38-12,157.77

Finding the Fourth Proportional to 18,219.45, 25,138.38 and 12,157.77

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Solution

The fourth proportional to 18,219.45, 25,138.38 and 12,157.77 is: 16,774.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,219.45 : 25,138.38 = 12,157.77 : x
  2. Step 2: Convert to fraction form
    18,219.45/25,138.38 = 12,157.77/x
  3. Step 3: Cross multiply
    18,219.45x = 25,138.38 × 12,157.77
  4. Step 4: Simplify right side
    18,219.45x = 305,626,642.21
  5. Step 5: Solve for x
    x = 305,626,642.21/18,219.45
  6. Step 6: Final answer
    x = 16,774.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.