Home / 21,966-30,318.55-12,540.03

Finding the Fourth Proportional to 21,966, 30,318.55 and 12,540.03

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Solution

The fourth proportional to 21,966, 30,318.55 and 12,540.03 is: 17,308.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,966 : 30,318.55 = 12,540.03 : x
  2. Step 2: Convert to fraction form
    21,966/30,318.55 = 12,540.03/x
  3. Step 3: Cross multiply
    21,966x = 30,318.55 × 12,540.03
  4. Step 4: Simplify right side
    21,966x = 380,195,495.21
  5. Step 5: Solve for x
    x = 380,195,495.21/21,966
  6. Step 6: Final answer
    x = 17,308.36

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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.