Home / 20,073.42-30,128.36-10,721.36

Finding the Fourth Proportional to 20,073.42, 30,128.36 and 10,721.36

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Solution

The fourth proportional to 20,073.42, 30,128.36 and 10,721.36 is: 16,091.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,073.42 : 30,128.36 = 10,721.36 : x
  2. Step 2: Convert to fraction form
    20,073.42/30,128.36 = 10,721.36/x
  3. Step 3: Cross multiply
    20,073.42x = 30,128.36 × 10,721.36
  4. Step 4: Simplify right side
    20,073.42x = 323,017,015.48
  5. Step 5: Solve for x
    x = 323,017,015.48/20,073.42
  6. Step 6: Final answer
    x = 16,091.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.