Home / 20,965.44-28,931.82-12,018.21

Finding the Fourth Proportional to 20,965.44, 28,931.82 and 12,018.21

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Solution

The fourth proportional to 20,965.44, 28,931.82 and 12,018.21 is: 16,584.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.44 : 28,931.82 = 12,018.21 : x
  2. Step 2: Convert to fraction form
    20,965.44/28,931.82 = 12,018.21/x
  3. Step 3: Cross multiply
    20,965.44x = 28,931.82 × 12,018.21
  4. Step 4: Simplify right side
    20,965.44x = 347,708,688.44
  5. Step 5: Solve for x
    x = 347,708,688.44/20,965.44
  6. Step 6: Final answer
    x = 16,584.85

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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.