Home / 21,622.64-29,824.40-13,243.28

Finding the Fourth Proportional to 21,622.64, 29,824.40 and 13,243.28

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Solution

The fourth proportional to 21,622.64, 29,824.40 and 13,243.28 is: 18,266.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.64 : 29,824.40 = 13,243.28 : x
  2. Step 2: Convert to fraction form
    21,622.64/29,824.40 = 13,243.28/x
  3. Step 3: Cross multiply
    21,622.64x = 29,824.40 × 13,243.28
  4. Step 4: Simplify right side
    21,622.64x = 394,972,880.03
  5. Step 5: Solve for x
    x = 394,972,880.03/21,622.64
  6. Step 6: Final answer
    x = 18,266.64

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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.