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Finding the Fourth Proportional to 28,905.02, 43,357.52 and 8,128.52

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Solution

The fourth proportional to 28,905.02, 43,357.52 and 8,128.52 is: 12,192.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,905.02 : 43,357.52 = 8,128.52 : x
  2. Step 2: Convert to fraction form
    28,905.02/43,357.52 = 8,128.52/x
  3. Step 3: Cross multiply
    28,905.02x = 43,357.52 × 8,128.52
  4. Step 4: Simplify right side
    28,905.02x = 352,432,468.47
  5. Step 5: Solve for x
    x = 352,432,468.47/28,905.02
  6. Step 6: Final answer
    x = 12,192.78

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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.