Home / 21,687.06-29,928.39-12,734.67

Finding the Fourth Proportional to 21,687.06, 29,928.39 and 12,734.67

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Solution

The fourth proportional to 21,687.06, 29,928.39 and 12,734.67 is: 17,573.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.06 : 29,928.39 = 12,734.67 : x
  2. Step 2: Convert to fraction form
    21,687.06/29,928.39 = 12,734.67/x
  3. Step 3: Cross multiply
    21,687.06x = 29,928.39 × 12,734.67
  4. Step 4: Simplify right side
    21,687.06x = 381,128,170.28
  5. Step 5: Solve for x
    x = 381,128,170.28/21,687.06
  6. Step 6: Final answer
    x = 17,573.99

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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.