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Finding the Fourth Proportional to 12,860.63, 17,737.86 and 11,071.05

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Solution

The fourth proportional to 12,860.63, 17,737.86 and 11,071.05 is: 15,269.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.63 : 17,737.86 = 11,071.05 : x
  2. Step 2: Convert to fraction form
    12,860.63/17,737.86 = 11,071.05/x
  3. Step 3: Cross multiply
    12,860.63x = 17,737.86 × 11,071.05
  4. Step 4: Simplify right side
    12,860.63x = 196,376,734.95
  5. Step 5: Solve for x
    x = 196,376,734.95/12,860.63
  6. Step 6: Final answer
    x = 15,269.61

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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.