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Finding the Fourth Proportional to 13,117.98, 18,089.07 and 8,635.99

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Solution

The fourth proportional to 13,117.98, 18,089.07 and 8,635.99 is: 11,908.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.98 : 18,089.07 = 8,635.99 : x
  2. Step 2: Convert to fraction form
    13,117.98/18,089.07 = 8,635.99/x
  3. Step 3: Cross multiply
    13,117.98x = 18,089.07 × 8,635.99
  4. Step 4: Simplify right side
    13,117.98x = 156,217,083.39
  5. Step 5: Solve for x
    x = 156,217,083.39/13,117.98
  6. Step 6: Final answer
    x = 11,908.63

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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.