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Finding the Fourth Proportional to 7,970.52, 11,955.78 and 2,126.82

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Solution

The fourth proportional to 7,970.52, 11,955.78 and 2,126.82 is: 3,190.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,970.52 : 11,955.78 = 2,126.82 : x
  2. Step 2: Convert to fraction form
    7,970.52/11,955.78 = 2,126.82/x
  3. Step 3: Cross multiply
    7,970.52x = 11,955.78 × 2,126.82
  4. Step 4: Simplify right side
    7,970.52x = 25,427,792.02
  5. Step 5: Solve for x
    x = 25,427,792.02/7,970.52
  6. Step 6: Final answer
    x = 3,190.23

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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.