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Finding the Fourth Proportional to 13,694.61, 18,898.50 and 7,406.97

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Solution

The fourth proportional to 13,694.61, 18,898.50 and 7,406.97 is: 10,221.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,694.61 : 18,898.50 = 7,406.97 : x
  2. Step 2: Convert to fraction form
    13,694.61/18,898.50 = 7,406.97/x
  3. Step 3: Cross multiply
    13,694.61x = 18,898.50 × 7,406.97
  4. Step 4: Simplify right side
    13,694.61x = 139,980,622.55
  5. Step 5: Solve for x
    x = 139,980,622.55/13,694.61
  6. Step 6: Final answer
    x = 10,221.59

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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.