Home / 7,911.71-11,867.59-2,980.03

Finding the Fourth Proportional to 7,911.71, 11,867.59 and 2,980.03

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Solution

The fourth proportional to 7,911.71, 11,867.59 and 2,980.03 is: 4,470.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.71 : 11,867.59 = 2,980.03 : x
  2. Step 2: Convert to fraction form
    7,911.71/11,867.59 = 2,980.03/x
  3. Step 3: Cross multiply
    7,911.71x = 11,867.59 × 2,980.03
  4. Step 4: Simplify right side
    7,911.71x = 35,365,714.89
  5. Step 5: Solve for x
    x = 35,365,714.89/7,911.71
  6. Step 6: Final answer
    x = 4,470.05

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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.