Home / 28,762.20-43,143.30-7,985.70

Finding the Fourth Proportional to 28,762.20, 43,143.30 and 7,985.70

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Solution

The fourth proportional to 28,762.20, 43,143.30 and 7,985.70 is: 11,978.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,762.20 : 43,143.30 = 7,985.70 : x
  2. Step 2: Convert to fraction form
    28,762.20/43,143.30 = 7,985.70/x
  3. Step 3: Cross multiply
    28,762.20x = 43,143.30 × 7,985.70
  4. Step 4: Simplify right side
    28,762.20x = 344,529,450.81
  5. Step 5: Solve for x
    x = 344,529,450.81/28,762.20
  6. Step 6: Final answer
    x = 11,978.55

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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.