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Finding the Fourth Proportional to 18,796.52, 28,170.18 and 7,690.21

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Solution

The fourth proportional to 18,796.52, 28,170.18 and 7,690.21 is: 11,525.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,796.52 : 28,170.18 = 7,690.21 : x
  2. Step 2: Convert to fraction form
    18,796.52/28,170.18 = 7,690.21/x
  3. Step 3: Cross multiply
    18,796.52x = 28,170.18 × 7,690.21
  4. Step 4: Simplify right side
    18,796.52x = 216,634,529.51
  5. Step 5: Solve for x
    x = 216,634,529.51/18,796.52
  6. Step 6: Final answer
    x = 11,525.25

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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.