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Finding the Fourth Proportional to 7,134.40, 9,845.04 and 3,990.52

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Solution

The fourth proportional to 7,134.40, 9,845.04 and 3,990.52 is: 5,506.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,134.40 : 9,845.04 = 3,990.52 : x
  2. Step 2: Convert to fraction form
    7,134.40/9,845.04 = 3,990.52/x
  3. Step 3: Cross multiply
    7,134.40x = 9,845.04 × 3,990.52
  4. Step 4: Simplify right side
    7,134.40x = 39,286,829.02
  5. Step 5: Solve for x
    x = 39,286,829.02/7,134.40
  6. Step 6: Final answer
    x = 5,506.68

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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.