Home / 21,109.44-29,129.58-11,678.34

Finding the Fourth Proportional to 21,109.44, 29,129.58 and 11,678.34

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Solution

The fourth proportional to 21,109.44, 29,129.58 and 11,678.34 is: 16,115.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.44 : 29,129.58 = 11,678.34 : x
  2. Step 2: Convert to fraction form
    21,109.44/29,129.58 = 11,678.34/x
  3. Step 3: Cross multiply
    21,109.44x = 29,129.58 × 11,678.34
  4. Step 4: Simplify right side
    21,109.44x = 340,185,139.30
  5. Step 5: Solve for x
    x = 340,185,139.30/21,109.44
  6. Step 6: Final answer
    x = 16,115.31

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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.