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Finding the Fourth Proportional to 7,119.80, 10,679.70 and 6,601.40

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Solution

The fourth proportional to 7,119.80, 10,679.70 and 6,601.40 is: 9,902.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,119.80 : 10,679.70 = 6,601.40 : x
  2. Step 2: Convert to fraction form
    7,119.80/10,679.70 = 6,601.40/x
  3. Step 3: Cross multiply
    7,119.80x = 10,679.70 × 6,601.40
  4. Step 4: Simplify right side
    7,119.80x = 70,500,971.58
  5. Step 5: Solve for x
    x = 70,500,971.58/7,119.80
  6. Step 6: Final answer
    x = 9,902.10

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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.