Home / 7,049.20-9,727.84-3,905.40

Finding the Fourth Proportional to 7,049.20, 9,727.84 and 3,905.40

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Solution

The fourth proportional to 7,049.20, 9,727.84 and 3,905.40 is: 5,389.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,049.20 : 9,727.84 = 3,905.40 : x
  2. Step 2: Convert to fraction form
    7,049.20/9,727.84 = 3,905.40/x
  3. Step 3: Cross multiply
    7,049.20x = 9,727.84 × 3,905.40
  4. Step 4: Simplify right side
    7,049.20x = 37,991,106.34
  5. Step 5: Solve for x
    x = 37,991,106.34/7,049.20
  6. Step 6: Final answer
    x = 5,389.42

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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.