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Finding the Fourth Proportional to 11,396.91, 15,736.64 and 8,740.11

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Solution

The fourth proportional to 11,396.91, 15,736.64 and 8,740.11 is: 12,068.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,396.91 : 15,736.64 = 8,740.11 : x
  2. Step 2: Convert to fraction form
    11,396.91/15,736.64 = 8,740.11/x
  3. Step 3: Cross multiply
    11,396.91x = 15,736.64 × 8,740.11
  4. Step 4: Simplify right side
    11,396.91x = 137,539,920.93
  5. Step 5: Solve for x
    x = 137,539,920.93/11,396.91
  6. Step 6: Final answer
    x = 12,068.18

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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.