Home / 21,101.78-29,120.76-11,670.32

Finding the Fourth Proportional to 21,101.78, 29,120.76 and 11,670.32

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Solution

The fourth proportional to 21,101.78, 29,120.76 and 11,670.32 is: 16,105.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.78 : 29,120.76 = 11,670.32 : x
  2. Step 2: Convert to fraction form
    21,101.78/29,120.76 = 11,670.32/x
  3. Step 3: Cross multiply
    21,101.78x = 29,120.76 × 11,670.32
  4. Step 4: Simplify right side
    21,101.78x = 339,848,587.84
  5. Step 5: Solve for x
    x = 339,848,587.84/21,101.78
  6. Step 6: Final answer
    x = 16,105.21

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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.