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Finding the Fourth Proportional to 28,861.80, 43,292.70 and 19,012.20

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Solution

The fourth proportional to 28,861.80, 43,292.70 and 19,012.20 is: 28,518.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,861.80 : 43,292.70 = 19,012.20 : x
  2. Step 2: Convert to fraction form
    28,861.80/43,292.70 = 19,012.20/x
  3. Step 3: Cross multiply
    28,861.80x = 43,292.70 × 19,012.20
  4. Step 4: Simplify right side
    28,861.80x = 823,089,470.94
  5. Step 5: Solve for x
    x = 823,089,470.94/28,861.80
  6. Step 6: Final answer
    x = 28,518.30

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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.