Home / 20,778.94-28,671.12-12,282.45

Finding the Fourth Proportional to 20,778.94, 28,671.12 and 12,282.45

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Solution

The fourth proportional to 20,778.94, 28,671.12 and 12,282.45 is: 16,947.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.94 : 28,671.12 = 12,282.45 : x
  2. Step 2: Convert to fraction form
    20,778.94/28,671.12 = 12,282.45/x
  3. Step 3: Cross multiply
    20,778.94x = 28,671.12 × 12,282.45
  4. Step 4: Simplify right side
    20,778.94x = 352,151,597.84
  5. Step 5: Solve for x
    x = 352,151,597.84/20,778.94
  6. Step 6: Final answer
    x = 16,947.52

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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.