Home / 7,135.20-10,715.60-6,904.80

Finding the Fourth Proportional to 7,135.20, 10,715.60 and 6,904.80

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Solution

The fourth proportional to 7,135.20, 10,715.60 and 6,904.80 is: 10,369.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,135.20 : 10,715.60 = 6,904.80 : x
  2. Step 2: Convert to fraction form
    7,135.20/10,715.60 = 6,904.80/x
  3. Step 3: Cross multiply
    7,135.20x = 10,715.60 × 6,904.80
  4. Step 4: Simplify right side
    7,135.20x = 73,989,074.88
  5. Step 5: Solve for x
    x = 73,989,074.88/7,135.20
  6. Step 6: Final answer
    x = 10,369.59

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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.