Home / 21,971-30,319.96-11,899.44

Finding the Fourth Proportional to 21,971, 30,319.96 and 11,899.44

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Solution

The fourth proportional to 21,971, 30,319.96 and 11,899.44 is: 16,421.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971 : 30,319.96 = 11,899.44 : x
  2. Step 2: Convert to fraction form
    21,971/30,319.96 = 11,899.44/x
  3. Step 3: Cross multiply
    21,971x = 30,319.96 × 11,899.44
  4. Step 4: Simplify right side
    21,971x = 360,790,544.82
  5. Step 5: Solve for x
    x = 360,790,544.82/21,971
  6. Step 6: Final answer
    x = 16,421.22

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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.