Home / 20,651.49-30,979.13-6,611.90

Finding the Fourth Proportional to 20,651.49, 30,979.13 and 6,611.90

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Solution

The fourth proportional to 20,651.49, 30,979.13 and 6,611.90 is: 9,918.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.49 : 30,979.13 = 6,611.90 : x
  2. Step 2: Convert to fraction form
    20,651.49/30,979.13 = 6,611.90/x
  3. Step 3: Cross multiply
    20,651.49x = 30,979.13 × 6,611.90
  4. Step 4: Simplify right side
    20,651.49x = 204,830,721.69
  5. Step 5: Solve for x
    x = 204,830,721.69/20,651.49
  6. Step 6: Final answer
    x = 9,918.45

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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.