Home / 20,946.35-28,907.13-11,991.80

Finding the Fourth Proportional to 20,946.35, 28,907.13 and 11,991.80

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Solution

The fourth proportional to 20,946.35, 28,907.13 and 11,991.80 is: 16,549.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.35 : 28,907.13 = 11,991.80 : x
  2. Step 2: Convert to fraction form
    20,946.35/28,907.13 = 11,991.80/x
  3. Step 3: Cross multiply
    20,946.35x = 28,907.13 × 11,991.80
  4. Step 4: Simplify right side
    20,946.35x = 346,648,377.00
  5. Step 5: Solve for x
    x = 346,648,377.00/20,946.35
  6. Step 6: Final answer
    x = 16,549.35

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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.