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Finding the Fourth Proportional to 13,698.87, 18,908.06 and 8,034.45

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Solution

The fourth proportional to 13,698.87, 18,908.06 and 8,034.45 is: 11,089.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.87 : 18,908.06 = 8,034.45 : x
  2. Step 2: Convert to fraction form
    13,698.87/18,908.06 = 8,034.45/x
  3. Step 3: Cross multiply
    13,698.87x = 18,908.06 × 8,034.45
  4. Step 4: Simplify right side
    13,698.87x = 151,915,862.67
  5. Step 5: Solve for x
    x = 151,915,862.67/13,698.87
  6. Step 6: Final answer
    x = 11,089.66

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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.