Home / 7,161.21-9,880.46-4,288.76

Finding the Fourth Proportional to 7,161.21, 9,880.46 and 4,288.76

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Solution

The fourth proportional to 7,161.21, 9,880.46 and 4,288.76 is: 5,917.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,161.21 : 9,880.46 = 4,288.76 : x
  2. Step 2: Convert to fraction form
    7,161.21/9,880.46 = 4,288.76/x
  3. Step 3: Cross multiply
    7,161.21x = 9,880.46 × 4,288.76
  4. Step 4: Simplify right side
    7,161.21x = 42,374,903.92
  5. Step 5: Solve for x
    x = 42,374,903.92/7,161.21
  6. Step 6: Final answer
    x = 5,917.28

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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.