Home / 20,847.84-28,777.86-13,783.86

Finding the Fourth Proportional to 20,847.84, 28,777.86 and 13,783.86

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Solution

The fourth proportional to 20,847.84, 28,777.86 and 13,783.86 is: 19,026.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,847.84 : 28,777.86 = 13,783.86 : x
  2. Step 2: Convert to fraction form
    20,847.84/28,777.86 = 13,783.86/x
  3. Step 3: Cross multiply
    20,847.84x = 28,777.86 × 13,783.86
  4. Step 4: Simplify right side
    20,847.84x = 396,669,993.34
  5. Step 5: Solve for x
    x = 396,669,993.34/20,847.84
  6. Step 6: Final answer
    x = 19,026.91

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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.