Home / 21,810.95-30,099.26-12,379.67

Finding the Fourth Proportional to 21,810.95, 30,099.26 and 12,379.67

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Solution

The fourth proportional to 21,810.95, 30,099.26 and 12,379.67 is: 17,084.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,810.95 : 30,099.26 = 12,379.67 : x
  2. Step 2: Convert to fraction form
    21,810.95/30,099.26 = 12,379.67/x
  3. Step 3: Cross multiply
    21,810.95x = 30,099.26 × 12,379.67
  4. Step 4: Simplify right side
    21,810.95x = 372,618,844.15
  5. Step 5: Solve for x
    x = 372,618,844.15/21,810.95
  6. Step 6: Final answer
    x = 17,084.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.