Home / 9,871.75-13,621.44-5,622.90

Finding the Fourth Proportional to 9,871.75, 13,621.44 and 5,622.90

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Solution

The fourth proportional to 9,871.75, 13,621.44 and 5,622.90 is: 7,758.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.75 : 13,621.44 = 5,622.90 : x
  2. Step 2: Convert to fraction form
    9,871.75/13,621.44 = 5,622.90/x
  3. Step 3: Cross multiply
    9,871.75x = 13,621.44 × 5,622.90
  4. Step 4: Simplify right side
    9,871.75x = 76,591,971.75
  5. Step 5: Solve for x
    x = 76,591,971.75/9,871.75
  6. Step 6: Final answer
    x = 7,758.70

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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.