Home / 20,973.78-28,943.80-11,542.35

Finding the Fourth Proportional to 20,973.78, 28,943.80 and 11,542.35

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Solution

The fourth proportional to 20,973.78, 28,943.80 and 11,542.35 is: 15,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.78 : 28,943.80 = 11,542.35 : x
  2. Step 2: Convert to fraction form
    20,973.78/28,943.80 = 11,542.35/x
  3. Step 3: Cross multiply
    20,973.78x = 28,943.80 × 11,542.35
  4. Step 4: Simplify right side
    20,973.78x = 334,079,469.93
  5. Step 5: Solve for x
    x = 334,079,469.93/20,973.78
  6. Step 6: Final answer
    x = 15,928.43

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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.