Home / 21,969.38-30,320.97-12,540.26

Finding the Fourth Proportional to 21,969.38, 30,320.97 and 12,540.26

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Solution

The fourth proportional to 21,969.38, 30,320.97 and 12,540.26 is: 17,307.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.38 : 30,320.97 = 12,540.26 : x
  2. Step 2: Convert to fraction form
    21,969.38/30,320.97 = 12,540.26/x
  3. Step 3: Cross multiply
    21,969.38x = 30,320.97 × 12,540.26
  4. Step 4: Simplify right side
    21,969.38x = 380,232,847.25
  5. Step 5: Solve for x
    x = 380,232,847.25/21,969.38
  6. Step 6: Final answer
    x = 17,307.40

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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.