Home / 13,918.06-20,870.28-6,889.96

Finding the Fourth Proportional to 13,918.06, 20,870.28 and 6,889.96

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Solution

The fourth proportional to 13,918.06, 20,870.28 and 6,889.96 is: 10,331.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,918.06 : 20,870.28 = 6,889.96 : x
  2. Step 2: Convert to fraction form
    13,918.06/20,870.28 = 6,889.96/x
  3. Step 3: Cross multiply
    13,918.06x = 20,870.28 × 6,889.96
  4. Step 4: Simplify right side
    13,918.06x = 143,795,394.39
  5. Step 5: Solve for x
    x = 143,795,394.39/13,918.06
  6. Step 6: Final answer
    x = 10,331.57

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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.