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Finding the Fourth Proportional to 13,698.97, 18,905.14 and 7,730.64

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Solution

The fourth proportional to 13,698.97, 18,905.14 and 7,730.64 is: 10,668.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.97 : 18,905.14 = 7,730.64 : x
  2. Step 2: Convert to fraction form
    13,698.97/18,905.14 = 7,730.64/x
  3. Step 3: Cross multiply
    13,698.97x = 18,905.14 × 7,730.64
  4. Step 4: Simplify right side
    13,698.97x = 146,148,736.96
  5. Step 5: Solve for x
    x = 146,148,736.96/13,698.97
  6. Step 6: Final answer
    x = 10,668.60

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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.