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Finding the Fourth Proportional to 26,988.50, 40,489.23 and 8,520.50

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Solution

The fourth proportional to 26,988.50, 40,489.23 and 8,520.50 is: 12,782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,988.50 : 40,489.23 = 8,520.50 : x
  2. Step 2: Convert to fraction form
    26,988.50/40,489.23 = 8,520.50/x
  3. Step 3: Cross multiply
    26,988.50x = 40,489.23 × 8,520.50
  4. Step 4: Simplify right side
    26,988.50x = 344,988,484.22
  5. Step 5: Solve for x
    x = 344,988,484.22/26,988.50
  6. Step 6: Final answer
    x = 12,782.80

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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.