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Finding the Fourth Proportional to 7,809.60, 11,714.40 and 2,880.75

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Solution

The fourth proportional to 7,809.60, 11,714.40 and 2,880.75 is: 4,321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,809.60 : 11,714.40 = 2,880.75 : x
  2. Step 2: Convert to fraction form
    7,809.60/11,714.40 = 2,880.75/x
  3. Step 3: Cross multiply
    7,809.60x = 11,714.40 × 2,880.75
  4. Step 4: Simplify right side
    7,809.60x = 33,746,257.80
  5. Step 5: Solve for x
    x = 33,746,257.80/7,809.60
  6. Step 6: Final answer
    x = 4,321.13

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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.