Home / 30,012.21-45,018.72-28,185.66

Finding the Fourth Proportional to 30,012.21, 45,018.72 and 28,185.66

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Solution

The fourth proportional to 30,012.21, 45,018.72 and 28,185.66 is: 42,278.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,012.21 : 45,018.72 = 28,185.66 : x
  2. Step 2: Convert to fraction form
    30,012.21/45,018.72 = 28,185.66/x
  3. Step 3: Cross multiply
    30,012.21x = 45,018.72 × 28,185.66
  4. Step 4: Simplify right side
    30,012.21x = 1,268,882,335.56
  5. Step 5: Solve for x
    x = 1,268,882,335.56/30,012.21
  6. Step 6: Final answer
    x = 42,278.87

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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.