Home / 28,905.40-43,358.10-9,185.95

Finding the Fourth Proportional to 28,905.40, 43,358.10 and 9,185.95

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Solution

The fourth proportional to 28,905.40, 43,358.10 and 9,185.95 is: 13,778.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,905.40 : 43,358.10 = 9,185.95 : x
  2. Step 2: Convert to fraction form
    28,905.40/43,358.10 = 9,185.95/x
  3. Step 3: Cross multiply
    28,905.40x = 43,358.10 × 9,185.95
  4. Step 4: Simplify right side
    28,905.40x = 398,285,338.70
  5. Step 5: Solve for x
    x = 398,285,338.70/28,905.40
  6. Step 6: Final answer
    x = 13,778.93

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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.