Home / 20,783.39-31,170.63-5,989.55

Finding the Fourth Proportional to 20,783.39, 31,170.63 and 5,989.55

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Solution

The fourth proportional to 20,783.39, 31,170.63 and 5,989.55 is: 8,983.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.39 : 31,170.63 = 5,989.55 : x
  2. Step 2: Convert to fraction form
    20,783.39/31,170.63 = 5,989.55/x
  3. Step 3: Cross multiply
    20,783.39x = 31,170.63 × 5,989.55
  4. Step 4: Simplify right side
    20,783.39x = 186,698,046.92
  5. Step 5: Solve for x
    x = 186,698,046.92/20,783.39
  6. Step 6: Final answer
    x = 8,983.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.