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Finding the Fourth Proportional to 13,935.56, 20,904.56 and 5,170.56

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Solution

The fourth proportional to 13,935.56, 20,904.56 and 5,170.56 is: 7,756.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,935.56 : 20,904.56 = 5,170.56 : x
  2. Step 2: Convert to fraction form
    13,935.56/20,904.56 = 5,170.56/x
  3. Step 3: Cross multiply
    13,935.56x = 20,904.56 × 5,170.56
  4. Step 4: Simplify right side
    13,935.56x = 108,088,281.75
  5. Step 5: Solve for x
    x = 108,088,281.75/13,935.56
  6. Step 6: Final answer
    x = 7,756.29

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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.