Home / 28,930.71-43,401.87-12,290.61

Finding the Fourth Proportional to 28,930.71, 43,401.87 and 12,290.61

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Solution

The fourth proportional to 28,930.71, 43,401.87 and 12,290.61 is: 18,438.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.71 : 43,401.87 = 12,290.61 : x
  2. Step 2: Convert to fraction form
    28,930.71/43,401.87 = 12,290.61/x
  3. Step 3: Cross multiply
    28,930.71x = 43,401.87 × 12,290.61
  4. Step 4: Simplify right side
    28,930.71x = 533,435,457.44
  5. Step 5: Solve for x
    x = 533,435,457.44/28,930.71
  6. Step 6: Final answer
    x = 18,438.38

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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.