Home / 6,918.84-10,378.67-1,988.37

Finding the Fourth Proportional to 6,918.84, 10,378.67 and 1,988.37

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Solution

The fourth proportional to 6,918.84, 10,378.67 and 1,988.37 is: 2,982.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.84 : 10,378.67 = 1,988.37 : x
  2. Step 2: Convert to fraction form
    6,918.84/10,378.67 = 1,988.37/x
  3. Step 3: Cross multiply
    6,918.84x = 10,378.67 × 1,988.37
  4. Step 4: Simplify right side
    6,918.84x = 20,636,626.13
  5. Step 5: Solve for x
    x = 20,636,626.13/6,918.84
  6. Step 6: Final answer
    x = 2,982.67

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1.5x scale

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.