Home / 18,907.74-28,359.45-7,220.70

Finding the Fourth Proportional to 18,907.74, 28,359.45 and 7,220.70

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Solution

The fourth proportional to 18,907.74, 28,359.45 and 7,220.70 is: 10,830.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.74 : 28,359.45 = 7,220.70 : x
  2. Step 2: Convert to fraction form
    18,907.74/28,359.45 = 7,220.70/x
  3. Step 3: Cross multiply
    18,907.74x = 28,359.45 × 7,220.70
  4. Step 4: Simplify right side
    18,907.74x = 204,775,080.62
  5. Step 5: Solve for x
    x = 204,775,080.62/18,907.74
  6. Step 6: Final answer
    x = 10,830.23

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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.