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Finding the Fourth Proportional to 6,963.60, 9,609.08 and 3,980.16

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Solution

The fourth proportional to 6,963.60, 9,609.08 and 3,980.16 is: 5,492.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,963.60 : 9,609.08 = 3,980.16 : x
  2. Step 2: Convert to fraction form
    6,963.60/9,609.08 = 3,980.16/x
  3. Step 3: Cross multiply
    6,963.60x = 9,609.08 × 3,980.16
  4. Step 4: Simplify right side
    6,963.60x = 38,245,675.85
  5. Step 5: Solve for x
    x = 38,245,675.85/6,963.60
  6. Step 6: Final answer
    x = 5,492.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.