Home / 6,450.39-9,681.53-3,990.02

Finding the Fourth Proportional to 6,450.39, 9,681.53 and 3,990.02

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Solution

The fourth proportional to 6,450.39, 9,681.53 and 3,990.02 is: 5,988.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,450.39 : 9,681.53 = 3,990.02 : x
  2. Step 2: Convert to fraction form
    6,450.39/9,681.53 = 3,990.02/x
  3. Step 3: Cross multiply
    6,450.39x = 9,681.53 × 3,990.02
  4. Step 4: Simplify right side
    6,450.39x = 38,629,429.97
  5. Step 5: Solve for x
    x = 38,629,429.97/6,450.39
  6. Step 6: Final answer
    x = 5,988.70

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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.