Home / 20,976.33-28,946.78-11,416.40

Finding the Fourth Proportional to 20,976.33, 28,946.78 and 11,416.40

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Solution

The fourth proportional to 20,976.33, 28,946.78 and 11,416.40 is: 15,754.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.33 : 28,946.78 = 11,416.40 : x
  2. Step 2: Convert to fraction form
    20,976.33/28,946.78 = 11,416.40/x
  3. Step 3: Cross multiply
    20,976.33x = 28,946.78 × 11,416.40
  4. Step 4: Simplify right side
    20,976.33x = 330,468,019.19
  5. Step 5: Solve for x
    x = 330,468,019.19/20,976.33
  6. Step 6: Final answer
    x = 15,754.33

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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.