Home / 20,519.45-30,783.93-6,480.87

Finding the Fourth Proportional to 20,519.45, 30,783.93 and 6,480.87

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Solution

The fourth proportional to 20,519.45, 30,783.93 and 6,480.87 is: 9,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.45 : 30,783.93 = 6,480.87 : x
  2. Step 2: Convert to fraction form
    20,519.45/30,783.93 = 6,480.87/x
  3. Step 3: Cross multiply
    20,519.45x = 30,783.93 × 6,480.87
  4. Step 4: Simplify right side
    20,519.45x = 199,506,648.42
  5. Step 5: Solve for x
    x = 199,506,648.42/20,519.45
  6. Step 6: Final answer
    x = 9,722.81

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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.