Home / 20,213.80-30,325.74-11,900.68

Finding the Fourth Proportional to 20,213.80, 30,325.74 and 11,900.68

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Solution

The fourth proportional to 20,213.80, 30,325.74 and 11,900.68 is: 17,853.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,213.80 : 30,325.74 = 11,900.68 : x
  2. Step 2: Convert to fraction form
    20,213.80/30,325.74 = 11,900.68/x
  3. Step 3: Cross multiply
    20,213.80x = 30,325.74 × 11,900.68
  4. Step 4: Simplify right side
    20,213.80x = 360,896,927.50
  5. Step 5: Solve for x
    x = 360,896,927.50/20,213.80
  6. Step 6: Final answer
    x = 17,853.99

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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.