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Finding the Fourth Proportional to 28,611.40, 42,917.10 and 26,998.60

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Solution

The fourth proportional to 28,611.40, 42,917.10 and 26,998.60 is: 40,497.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,611.40 : 42,917.10 = 26,998.60 : x
  2. Step 2: Convert to fraction form
    28,611.40/42,917.10 = 26,998.60/x
  3. Step 3: Cross multiply
    28,611.40x = 42,917.10 × 26,998.60
  4. Step 4: Simplify right side
    28,611.40x = 1,158,701,616.06
  5. Step 5: Solve for x
    x = 1,158,701,616.06/28,611.40
  6. Step 6: Final answer
    x = 40,497.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.