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Finding the Fourth Proportional to 26,811.40, 40,206.80 and 12,760.60

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Solution

The fourth proportional to 26,811.40, 40,206.80 and 12,760.60 is: 19,136.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,811.40 : 40,206.80 = 12,760.60 : x
  2. Step 2: Convert to fraction form
    26,811.40/40,206.80 = 12,760.60/x
  3. Step 3: Cross multiply
    26,811.40x = 40,206.80 × 12,760.60
  4. Step 4: Simplify right side
    26,811.40x = 513,062,892.08
  5. Step 5: Solve for x
    x = 513,062,892.08/26,811.40
  6. Step 6: Final answer
    x = 19,136.00

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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.