Home / 21,102.36-29,120.76-11,670.72

Finding the Fourth Proportional to 21,102.36, 29,120.76 and 11,670.72

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Solution

The fourth proportional to 21,102.36, 29,120.76 and 11,670.72 is: 16,105.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.36 : 29,120.76 = 11,670.72 : x
  2. Step 2: Convert to fraction form
    21,102.36/29,120.76 = 11,670.72/x
  3. Step 3: Cross multiply
    21,102.36x = 29,120.76 × 11,670.72
  4. Step 4: Simplify right side
    21,102.36x = 339,860,236.15
  5. Step 5: Solve for x
    x = 339,860,236.15/21,102.36
  6. Step 6: Final answer
    x = 16,105.32

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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.