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Finding the Fourth Proportional to 13,904.39, 20,843.62 and 6,970.79

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Solution

The fourth proportional to 13,904.39, 20,843.62 and 6,970.79 is: 10,449.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,904.39 : 20,843.62 = 6,970.79 : x
  2. Step 2: Convert to fraction form
    13,904.39/20,843.62 = 6,970.79/x
  3. Step 3: Cross multiply
    13,904.39x = 20,843.62 × 6,970.79
  4. Step 4: Simplify right side
    13,904.39x = 145,296,376.21
  5. Step 5: Solve for x
    x = 145,296,376.21/13,904.39
  6. Step 6: Final answer
    x = 10,449.68

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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.