Home / 13,516.30-18,640.83-12,728.98

Finding the Fourth Proportional to 13,516.30, 18,640.83 and 12,728.98

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Solution

The fourth proportional to 13,516.30, 18,640.83 and 12,728.98 is: 17,555.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,516.30 : 18,640.83 = 12,728.98 : x
  2. Step 2: Convert to fraction form
    13,516.30/18,640.83 = 12,728.98/x
  3. Step 3: Cross multiply
    13,516.30x = 18,640.83 × 12,728.98
  4. Step 4: Simplify right side
    13,516.30x = 237,278,752.25
  5. Step 5: Solve for x
    x = 237,278,752.25/13,516.30
  6. Step 6: Final answer
    x = 17,555.01

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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.