Home / 30,783.22-42,469.44-20,178.70

Finding the Fourth Proportional to 30,783.22, 42,469.44 and 20,178.70

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Solution

The fourth proportional to 30,783.22, 42,469.44 and 20,178.70 is: 27,839.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,783.22 : 42,469.44 = 20,178.70 : x
  2. Step 2: Convert to fraction form
    30,783.22/42,469.44 = 20,178.70/x
  3. Step 3: Cross multiply
    30,783.22x = 42,469.44 × 20,178.70
  4. Step 4: Simplify right side
    30,783.22x = 856,978,088.93
  5. Step 5: Solve for x
    x = 856,978,088.93/30,783.22
  6. Step 6: Final answer
    x = 27,839.13

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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.