Home / 7,912.08-10,919.40-4,555.20

Finding the Fourth Proportional to 7,912.08, 10,919.40 and 4,555.20

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Solution

The fourth proportional to 7,912.08, 10,919.40 and 4,555.20 is: 6,286.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.08 : 10,919.40 = 4,555.20 : x
  2. Step 2: Convert to fraction form
    7,912.08/10,919.40 = 4,555.20/x
  3. Step 3: Cross multiply
    7,912.08x = 10,919.40 × 4,555.20
  4. Step 4: Simplify right side
    7,912.08x = 49,740,050.88
  5. Step 5: Solve for x
    x = 49,740,050.88/7,912.08
  6. Step 6: Final answer
    x = 6,286.60

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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.