Home / 21,969.75-30,318.26-12,538.11

Finding the Fourth Proportional to 21,969.75, 30,318.26 and 12,538.11

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Solution

The fourth proportional to 21,969.75, 30,318.26 and 12,538.11 is: 17,302.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.75 : 30,318.26 = 12,538.11 : x
  2. Step 2: Convert to fraction form
    21,969.75/30,318.26 = 12,538.11/x
  3. Step 3: Cross multiply
    21,969.75x = 30,318.26 × 12,538.11
  4. Step 4: Simplify right side
    21,969.75x = 380,133,616.20
  5. Step 5: Solve for x
    x = 380,133,616.20/21,969.75
  6. Step 6: Final answer
    x = 17,302.59

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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.