Home / 7,930.90-11,887.71-3,308.50

Finding the Fourth Proportional to 7,930.90, 11,887.71 and 3,308.50

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Solution

The fourth proportional to 7,930.90, 11,887.71 and 3,308.50 is: 4,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,930.90 : 11,887.71 = 3,308.50 : x
  2. Step 2: Convert to fraction form
    7,930.90/11,887.71 = 3,308.50/x
  3. Step 3: Cross multiply
    7,930.90x = 11,887.71 × 3,308.50
  4. Step 4: Simplify right side
    7,930.90x = 39,330,488.54
  5. Step 5: Solve for x
    x = 39,330,488.54/7,930.90
  6. Step 6: Final answer
    x = 4,959.15

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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.