Home / 21,289.08-29,383.38-12,791.58

Finding the Fourth Proportional to 21,289.08, 29,383.38 and 12,791.58

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Solution

The fourth proportional to 21,289.08, 29,383.38 and 12,791.58 is: 17,655.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.08 : 29,383.38 = 12,791.58 : x
  2. Step 2: Convert to fraction form
    21,289.08/29,383.38 = 12,791.58/x
  3. Step 3: Cross multiply
    21,289.08x = 29,383.38 × 12,791.58
  4. Step 4: Simplify right side
    21,289.08x = 375,859,855.94
  5. Step 5: Solve for x
    x = 375,859,855.94/21,289.08
  6. Step 6: Final answer
    x = 17,655.05

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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.