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Finding the Fourth Proportional to 7,970.56, 11,955.84 and 2,776.40

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Solution

The fourth proportional to 7,970.56, 11,955.84 and 2,776.40 is: 4,164.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,970.56 : 11,955.84 = 2,776.40 : x
  2. Step 2: Convert to fraction form
    7,970.56/11,955.84 = 2,776.40/x
  3. Step 3: Cross multiply
    7,970.56x = 11,955.84 × 2,776.40
  4. Step 4: Simplify right side
    7,970.56x = 33,194,194.18
  5. Step 5: Solve for x
    x = 33,194,194.18/7,970.56
  6. Step 6: Final answer
    x = 4,164.60

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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.