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Finding the Fourth Proportional to 18,706.01, 25,790.95 and 11,980.58

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Solution

The fourth proportional to 18,706.01, 25,790.95 and 11,980.58 is: 16,518.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.01 : 25,790.95 = 11,980.58 : x
  2. Step 2: Convert to fraction form
    18,706.01/25,790.95 = 11,980.58/x
  3. Step 3: Cross multiply
    18,706.01x = 25,790.95 × 11,980.58
  4. Step 4: Simplify right side
    18,706.01x = 308,990,539.75
  5. Step 5: Solve for x
    x = 308,990,539.75/18,706.01
  6. Step 6: Final answer
    x = 16,518.25

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Similar ratio
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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.