Home / 21,228.40-31,804.20-17,311.60

Finding the Fourth Proportional to 21,228.40, 31,804.20 and 17,311.60

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Solution

The fourth proportional to 21,228.40, 31,804.20 and 17,311.60 is: 25,936.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.40 : 31,804.20 = 17,311.60 : x
  2. Step 2: Convert to fraction form
    21,228.40/31,804.20 = 17,311.60/x
  3. Step 3: Cross multiply
    21,228.40x = 31,804.20 × 17,311.60
  4. Step 4: Simplify right side
    21,228.40x = 550,581,588.72
  5. Step 5: Solve for x
    x = 550,581,588.72/21,228.40
  6. Step 6: Final answer
    x = 25,936.09

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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.