Home / 12,386.44-18,579.45-4,990.72

Finding the Fourth Proportional to 12,386.44, 18,579.45 and 4,990.72

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Solution

The fourth proportional to 12,386.44, 18,579.45 and 4,990.72 is: 7,485.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.44 : 18,579.45 = 4,990.72 : x
  2. Step 2: Convert to fraction form
    12,386.44/18,579.45 = 4,990.72/x
  3. Step 3: Cross multiply
    12,386.44x = 18,579.45 × 4,990.72
  4. Step 4: Simplify right side
    12,386.44x = 92,724,739.81
  5. Step 5: Solve for x
    x = 92,724,739.81/12,386.44
  6. Step 6: Final answer
    x = 7,485.99

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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.