Home / 13,402.86-18,497.79-8,100.78

Finding the Fourth Proportional to 13,402.86, 18,497.79 and 8,100.78

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Solution

The fourth proportional to 13,402.86, 18,497.79 and 8,100.78 is: 11,180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,402.86 : 18,497.79 = 8,100.78 : x
  2. Step 2: Convert to fraction form
    13,402.86/18,497.79 = 8,100.78/x
  3. Step 3: Cross multiply
    13,402.86x = 18,497.79 × 8,100.78
  4. Step 4: Simplify right side
    13,402.86x = 149,846,527.28
  5. Step 5: Solve for x
    x = 149,846,527.28/13,402.86
  6. Step 6: Final answer
    x = 11,180.19

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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.