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Finding the Fourth Proportional to 7,012.40, 9,672.90 and 5,518.04

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Solution

The fourth proportional to 7,012.40, 9,672.90 and 5,518.04 is: 7,611.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,012.40 : 9,672.90 = 5,518.04 : x
  2. Step 2: Convert to fraction form
    7,012.40/9,672.90 = 5,518.04/x
  3. Step 3: Cross multiply
    7,012.40x = 9,672.90 × 5,518.04
  4. Step 4: Simplify right side
    7,012.40x = 53,375,449.12
  5. Step 5: Solve for x
    x = 53,375,449.12/7,012.40
  6. Step 6: Final answer
    x = 7,611.58

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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.