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Finding the Fourth Proportional to 13,906.66, 20,859.80 and 3,376.76

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Solution

The fourth proportional to 13,906.66, 20,859.80 and 3,376.76 is: 5,065.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,906.66 : 20,859.80 = 3,376.76 : x
  2. Step 2: Convert to fraction form
    13,906.66/20,859.80 = 3,376.76/x
  3. Step 3: Cross multiply
    13,906.66x = 20,859.80 × 3,376.76
  4. Step 4: Simplify right side
    13,906.66x = 70,438,573.51
  5. Step 5: Solve for x
    x = 70,438,573.51/13,906.66
  6. Step 6: Final answer
    x = 5,065.10

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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.