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Finding the Fourth Proportional to 28,920.51, 43,384.28 and 8,144.01

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Solution

The fourth proportional to 28,920.51, 43,384.28 and 8,144.01 is: 12,217.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,920.51 : 43,384.28 = 8,144.01 : x
  2. Step 2: Convert to fraction form
    28,920.51/43,384.28 = 8,144.01/x
  3. Step 3: Cross multiply
    28,920.51x = 43,384.28 × 8,144.01
  4. Step 4: Simplify right side
    28,920.51x = 353,321,969.44
  5. Step 5: Solve for x
    x = 353,321,969.44/28,920.51
  6. Step 6: Final answer
    x = 12,217.00

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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.