Home / 21,009.40-31,481.70-17,704.60

Finding the Fourth Proportional to 21,009.40, 31,481.70 and 17,704.60

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Solution

The fourth proportional to 21,009.40, 31,481.70 and 17,704.60 is: 26,529.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.40 : 31,481.70 = 17,704.60 : x
  2. Step 2: Convert to fraction form
    21,009.40/31,481.70 = 17,704.60/x
  3. Step 3: Cross multiply
    21,009.40x = 31,481.70 × 17,704.60
  4. Step 4: Simplify right side
    21,009.40x = 557,370,905.82
  5. Step 5: Solve for x
    x = 557,370,905.82/21,009.40
  6. Step 6: Final answer
    x = 26,529.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.