Home / 20,315.08-30,480.72-7,168.78

Finding the Fourth Proportional to 20,315.08, 30,480.72 and 7,168.78

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Solution

The fourth proportional to 20,315.08, 30,480.72 and 7,168.78 is: 10,756.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.08 : 30,480.72 = 7,168.78 : x
  2. Step 2: Convert to fraction form
    20,315.08/30,480.72 = 7,168.78/x
  3. Step 3: Cross multiply
    20,315.08x = 30,480.72 × 7,168.78
  4. Step 4: Simplify right side
    20,315.08x = 218,509,575.92
  5. Step 5: Solve for x
    x = 218,509,575.92/20,315.08
  6. Step 6: Final answer
    x = 10,756.03

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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.