Home / 7,134.60-9,846.18-3,990.72

Finding the Fourth Proportional to 7,134.60, 9,846.18 and 3,990.72

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Solution

The fourth proportional to 7,134.60, 9,846.18 and 3,990.72 is: 5,507.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,134.60 : 9,846.18 = 3,990.72 : x
  2. Step 2: Convert to fraction form
    7,134.60/9,846.18 = 3,990.72/x
  3. Step 3: Cross multiply
    7,134.60x = 9,846.18 × 3,990.72
  4. Step 4: Simplify right side
    7,134.60x = 39,293,347.45
  5. Step 5: Solve for x
    x = 39,293,347.45/7,134.60
  6. Step 6: Final answer
    x = 5,507.44

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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.