Home / 21,971.62-30,320.74-11,899.80

Finding the Fourth Proportional to 21,971.62, 30,320.74 and 11,899.80

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Solution

The fourth proportional to 21,971.62, 30,320.74 and 11,899.80 is: 16,421.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.62 : 30,320.74 = 11,899.80 : x
  2. Step 2: Convert to fraction form
    21,971.62/30,320.74 = 11,899.80/x
  3. Step 3: Cross multiply
    21,971.62x = 30,320.74 × 11,899.80
  4. Step 4: Simplify right side
    21,971.62x = 360,810,741.85
  5. Step 5: Solve for x
    x = 360,810,741.85/21,971.62
  6. Step 6: Final answer
    x = 16,421.67

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1.5x scale

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.