Home / 7,920.58-11,877.36-4,222.12

Finding the Fourth Proportional to 7,920.58, 11,877.36 and 4,222.12

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Solution

The fourth proportional to 7,920.58, 11,877.36 and 4,222.12 is: 6,331.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.58 : 11,877.36 = 4,222.12 : x
  2. Step 2: Convert to fraction form
    7,920.58/11,877.36 = 4,222.12/x
  3. Step 3: Cross multiply
    7,920.58x = 11,877.36 × 4,222.12
  4. Step 4: Simplify right side
    7,920.58x = 50,147,639.20
  5. Step 5: Solve for x
    x = 50,147,639.20/7,920.58
  6. Step 6: Final answer
    x = 6,331.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.