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Finding the Fourth Proportional to 7,672.29, 11,506.70 and 2,990.69

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Solution

The fourth proportional to 7,672.29, 11,506.70 and 2,990.69 is: 4,485.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,672.29 : 11,506.70 = 2,990.69 : x
  2. Step 2: Convert to fraction form
    7,672.29/11,506.70 = 2,990.69/x
  3. Step 3: Cross multiply
    7,672.29x = 11,506.70 × 2,990.69
  4. Step 4: Simplify right side
    7,672.29x = 34,412,900.14
  5. Step 5: Solve for x
    x = 34,412,900.14/7,672.29
  6. Step 6: Final answer
    x = 4,485.35

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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.