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Finding the Fourth Proportional to 28,904.69, 43,357.04 and 8,128.19

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Solution

The fourth proportional to 28,904.69, 43,357.04 and 8,128.19 is: 12,192.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,904.69 : 43,357.04 = 8,128.19 : x
  2. Step 2: Convert to fraction form
    28,904.69/43,357.04 = 8,128.19/x
  3. Step 3: Cross multiply
    28,904.69x = 43,357.04 × 8,128.19
  4. Step 4: Simplify right side
    28,904.69x = 352,414,258.96
  5. Step 5: Solve for x
    x = 352,414,258.96/28,904.69
  6. Step 6: Final answer
    x = 12,192.29

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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.