Home / 14,380.03-21,570.05-3,991.78

Finding the Fourth Proportional to 14,380.03, 21,570.05 and 3,991.78

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Solution

The fourth proportional to 14,380.03, 21,570.05 and 3,991.78 is: 5,987.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,380.03 : 21,570.05 = 3,991.78 : x
  2. Step 2: Convert to fraction form
    14,380.03/21,570.05 = 3,991.78/x
  3. Step 3: Cross multiply
    14,380.03x = 21,570.05 × 3,991.78
  4. Step 4: Simplify right side
    14,380.03x = 86,102,908.68
  5. Step 5: Solve for x
    x = 86,102,908.68/14,380.03
  6. Step 6: Final answer
    x = 5,987.67

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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.