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Finding the Fourth Proportional to 28,897.31, 43,345.97 and 8,120.81

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Solution

The fourth proportional to 28,897.31, 43,345.97 and 8,120.81 is: 12,181.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,897.31 : 43,345.97 = 8,120.81 : x
  2. Step 2: Convert to fraction form
    28,897.31/43,345.97 = 8,120.81/x
  3. Step 3: Cross multiply
    28,897.31x = 43,345.97 × 8,120.81
  4. Step 4: Simplify right side
    28,897.31x = 352,004,484.85
  5. Step 5: Solve for x
    x = 352,004,484.85/28,897.31
  6. Step 6: Final answer
    x = 12,181.22

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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.