Home / 8,891.20-12,270.36-4,912.30

Finding the Fourth Proportional to 8,891.20, 12,270.36 and 4,912.30

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Solution

The fourth proportional to 8,891.20, 12,270.36 and 4,912.30 is: 6,779.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.20 : 12,270.36 = 4,912.30 : x
  2. Step 2: Convert to fraction form
    8,891.20/12,270.36 = 4,912.30/x
  3. Step 3: Cross multiply
    8,891.20x = 12,270.36 × 4,912.30
  4. Step 4: Simplify right side
    8,891.20x = 60,275,689.43
  5. Step 5: Solve for x
    x = 60,275,689.43/8,891.20
  6. Step 6: Final answer
    x = 6,779.25

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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.