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Finding the Fourth Proportional to 27,647.80, 41,471.70 and 18,899.80

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Solution

The fourth proportional to 27,647.80, 41,471.70 and 18,899.80 is: 28,349.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,647.80 : 41,471.70 = 18,899.80 : x
  2. Step 2: Convert to fraction form
    27,647.80/41,471.70 = 18,899.80/x
  3. Step 3: Cross multiply
    27,647.80x = 41,471.70 × 18,899.80
  4. Step 4: Simplify right side
    27,647.80x = 783,806,835.66
  5. Step 5: Solve for x
    x = 783,806,835.66/27,647.80
  6. Step 6: Final answer
    x = 28,349.70

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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.