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Finding the Fourth Proportional to 28,900.95, 43,351.43 and 8,124.45

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Solution

The fourth proportional to 28,900.95, 43,351.43 and 8,124.45 is: 12,186.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,900.95 : 43,351.43 = 8,124.45 : x
  2. Step 2: Convert to fraction form
    28,900.95/43,351.43 = 8,124.45/x
  3. Step 3: Cross multiply
    28,900.95x = 43,351.43 × 8,124.45
  4. Step 4: Simplify right side
    28,900.95x = 352,206,623.69
  5. Step 5: Solve for x
    x = 352,206,623.69/28,900.95
  6. Step 6: Final answer
    x = 12,186.68

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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.