Home / 13,678.26-20,527.38-12,861.78

Finding the Fourth Proportional to 13,678.26, 20,527.38 and 12,861.78

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Solution

The fourth proportional to 13,678.26, 20,527.38 and 12,861.78 is: 19,302.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.26 : 20,527.38 = 12,861.78 : x
  2. Step 2: Convert to fraction form
    13,678.26/20,527.38 = 12,861.78/x
  3. Step 3: Cross multiply
    13,678.26x = 20,527.38 × 12,861.78
  4. Step 4: Simplify right side
    13,678.26x = 264,018,645.54
  5. Step 5: Solve for x
    x = 264,018,645.54/13,678.26
  6. Step 6: Final answer
    x = 19,302.06

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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.