Home / 7,629.12-11,432.64-3,729.12

Finding the Fourth Proportional to 7,629.12, 11,432.64 and 3,729.12

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Solution

The fourth proportional to 7,629.12, 11,432.64 and 3,729.12 is: 5,588.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,629.12 : 11,432.64 = 3,729.12 : x
  2. Step 2: Convert to fraction form
    7,629.12/11,432.64 = 3,729.12/x
  3. Step 3: Cross multiply
    7,629.12x = 11,432.64 × 3,729.12
  4. Step 4: Simplify right side
    7,629.12x = 42,633,686.48
  5. Step 5: Solve for x
    x = 42,633,686.48/7,629.12
  6. Step 6: Final answer
    x = 5,588.28

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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.