Home / 20,843.28-28,763.79-11,412.45

Finding the Fourth Proportional to 20,843.28, 28,763.79 and 11,412.45

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Solution

The fourth proportional to 20,843.28, 28,763.79 and 11,412.45 is: 15,749.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,843.28 : 28,763.79 = 11,412.45 : x
  2. Step 2: Convert to fraction form
    20,843.28/28,763.79 = 11,412.45/x
  3. Step 3: Cross multiply
    20,843.28x = 28,763.79 × 11,412.45
  4. Step 4: Simplify right side
    20,843.28x = 328,265,315.19
  5. Step 5: Solve for x
    x = 328,265,315.19/20,843.28
  6. Step 6: Final answer
    x = 15,749.22

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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.