Home / 18,953.06-28,429.70-4,912.11

Finding the Fourth Proportional to 18,953.06, 28,429.70 and 4,912.11

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Solution

The fourth proportional to 18,953.06, 28,429.70 and 4,912.11 is: 7,368.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.06 : 28,429.70 = 4,912.11 : x
  2. Step 2: Convert to fraction form
    18,953.06/28,429.70 = 4,912.11/x
  3. Step 3: Cross multiply
    18,953.06x = 28,429.70 × 4,912.11
  4. Step 4: Simplify right side
    18,953.06x = 139,649,789.11
  5. Step 5: Solve for x
    x = 139,649,789.11/18,953.06
  6. Step 6: Final answer
    x = 7,368.19

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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.