Home / 7,987.47-11,981.70-2,440.82

Finding the Fourth Proportional to 7,987.47, 11,981.70 and 2,440.82

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Solution

The fourth proportional to 7,987.47, 11,981.70 and 2,440.82 is: 3,661.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,987.47 : 11,981.70 = 2,440.82 : x
  2. Step 2: Convert to fraction form
    7,987.47/11,981.70 = 2,440.82/x
  3. Step 3: Cross multiply
    7,987.47x = 11,981.70 × 2,440.82
  4. Step 4: Simplify right side
    7,987.47x = 29,245,113.09
  5. Step 5: Solve for x
    x = 29,245,113.09/7,987.47
  6. Step 6: Final answer
    x = 3,661.37

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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.