Home / 8,689.37-11,991.35-4,912.55

Finding the Fourth Proportional to 8,689.37, 11,991.35 and 4,912.55

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Solution

The fourth proportional to 8,689.37, 11,991.35 and 4,912.55 is: 6,779.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.37 : 11,991.35 = 4,912.55 : x
  2. Step 2: Convert to fraction form
    8,689.37/11,991.35 = 4,912.55/x
  3. Step 3: Cross multiply
    8,689.37x = 11,991.35 × 4,912.55
  4. Step 4: Simplify right side
    8,689.37x = 58,908,021.92
  5. Step 5: Solve for x
    x = 58,908,021.92/8,689.37
  6. Step 6: Final answer
    x = 6,779.32

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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.