Home / 20,946.90-28,907.21-11,387.33

Finding the Fourth Proportional to 20,946.90, 28,907.21 and 11,387.33

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Solution

The fourth proportional to 20,946.90, 28,907.21 and 11,387.33 is: 15,714.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.90 : 28,907.21 = 11,387.33 : x
  2. Step 2: Convert to fraction form
    20,946.90/28,907.21 = 11,387.33/x
  3. Step 3: Cross multiply
    20,946.90x = 28,907.21 × 11,387.33
  4. Step 4: Simplify right side
    20,946.90x = 329,175,939.65
  5. Step 5: Solve for x
    x = 329,175,939.65/20,946.90
  6. Step 6: Final answer
    x = 15,714.78

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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.