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Finding the Fourth Proportional to 7,974.60, 11,004.30 and 4,988.40

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Solution

The fourth proportional to 7,974.60, 11,004.30 and 4,988.40 is: 6,883.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,974.60 : 11,004.30 = 4,988.40 : x
  2. Step 2: Convert to fraction form
    7,974.60/11,004.30 = 4,988.40/x
  3. Step 3: Cross multiply
    7,974.60x = 11,004.30 × 4,988.40
  4. Step 4: Simplify right side
    7,974.60x = 54,893,850.12
  5. Step 5: Solve for x
    x = 54,893,850.12/7,974.60
  6. Step 6: Final answer
    x = 6,883.59

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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.