Home / 20,778.84-28,680.75-12,282.39

Finding the Fourth Proportional to 20,778.84, 28,680.75 and 12,282.39

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Solution

The fourth proportional to 20,778.84, 28,680.75 and 12,282.39 is: 16,953.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.84 : 28,680.75 = 12,282.39 : x
  2. Step 2: Convert to fraction form
    20,778.84/28,680.75 = 12,282.39/x
  3. Step 3: Cross multiply
    20,778.84x = 28,680.75 × 12,282.39
  4. Step 4: Simplify right side
    20,778.84x = 352,268,156.99
  5. Step 5: Solve for x
    x = 352,268,156.99/20,778.84
  6. Step 6: Final answer
    x = 16,953.22

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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.