Home / 21,383.88-29,485.67-13,820.24

Finding the Fourth Proportional to 21,383.88, 29,485.67 and 13,820.24

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Solution

The fourth proportional to 21,383.88, 29,485.67 and 13,820.24 is: 19,056.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,383.88 : 29,485.67 = 13,820.24 : x
  2. Step 2: Convert to fraction form
    21,383.88/29,485.67 = 13,820.24/x
  3. Step 3: Cross multiply
    21,383.88x = 29,485.67 × 13,820.24
  4. Step 4: Simplify right side
    21,383.88x = 407,498,819.43
  5. Step 5: Solve for x
    x = 407,498,819.43/21,383.88
  6. Step 6: Final answer
    x = 19,056.36

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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.