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Finding the Fourth Proportional to 28,739.66, 43,109.42 and 9,019.76

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Solution

The fourth proportional to 28,739.66, 43,109.42 and 9,019.76 is: 13,529.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,739.66 : 43,109.42 = 9,019.76 : x
  2. Step 2: Convert to fraction form
    28,739.66/43,109.42 = 9,019.76/x
  3. Step 3: Cross multiply
    28,739.66x = 43,109.42 × 9,019.76
  4. Step 4: Simplify right side
    28,739.66x = 388,836,622.14
  5. Step 5: Solve for x
    x = 388,836,622.14/28,739.66
  6. Step 6: Final answer
    x = 13,529.62

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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.