Home / 21,405.06-29,716.88-20,763.54

Finding the Fourth Proportional to 21,405.06, 29,716.88 and 20,763.54

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Solution

The fourth proportional to 21,405.06, 29,716.88 and 20,763.54 is: 28,826.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.06 : 29,716.88 = 20,763.54 : x
  2. Step 2: Convert to fraction form
    21,405.06/29,716.88 = 20,763.54/x
  3. Step 3: Cross multiply
    21,405.06x = 29,716.88 × 20,763.54
  4. Step 4: Simplify right side
    21,405.06x = 617,027,522.74
  5. Step 5: Solve for x
    x = 617,027,522.74/21,405.06
  6. Step 6: Final answer
    x = 28,826.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.