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Finding the Fourth Proportional to 17,820.60, 26,722.80 and 7,954.80

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Solution

The fourth proportional to 17,820.60, 26,722.80 and 7,954.80 is: 11,928.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,820.60 : 26,722.80 = 7,954.80 : x
  2. Step 2: Convert to fraction form
    17,820.60/26,722.80 = 7,954.80/x
  3. Step 3: Cross multiply
    17,820.60x = 26,722.80 × 7,954.80
  4. Step 4: Simplify right side
    17,820.60x = 212,574,529.44
  5. Step 5: Solve for x
    x = 212,574,529.44/17,820.60
  6. Step 6: Final answer
    x = 11,928.58

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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.