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Finding the Fourth Proportional to 28,895.70, 43,343.55 and 8,119.20

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Solution

The fourth proportional to 28,895.70, 43,343.55 and 8,119.20 is: 12,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,895.70 : 43,343.55 = 8,119.20 : x
  2. Step 2: Convert to fraction form
    28,895.70/43,343.55 = 8,119.20/x
  3. Step 3: Cross multiply
    28,895.70x = 43,343.55 × 8,119.20
  4. Step 4: Simplify right side
    28,895.70x = 351,914,951.16
  5. Step 5: Solve for x
    x = 351,914,951.16/28,895.70
  6. Step 6: Final answer
    x = 12,178.80

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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.