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Finding the Fourth Proportional to 28,900.70, 43,351.05 and 9,180.80

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Solution

The fourth proportional to 28,900.70, 43,351.05 and 9,180.80 is: 13,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,900.70 : 43,351.05 = 9,180.80 : x
  2. Step 2: Convert to fraction form
    28,900.70/43,351.05 = 9,180.80/x
  3. Step 3: Cross multiply
    28,900.70x = 43,351.05 × 9,180.80
  4. Step 4: Simplify right side
    28,900.70x = 397,997,319.84
  5. Step 5: Solve for x
    x = 397,997,319.84/28,900.70
  6. Step 6: Final answer
    x = 13,771.20

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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.