Home / 20,018.92-30,043.78-18,991.12

Finding the Fourth Proportional to 20,018.92, 30,043.78 and 18,991.12

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Solution

The fourth proportional to 20,018.92, 30,043.78 and 18,991.12 is: 28,501.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,018.92 : 30,043.78 = 18,991.12 : x
  2. Step 2: Convert to fraction form
    20,018.92/30,043.78 = 18,991.12/x
  3. Step 3: Cross multiply
    20,018.92x = 30,043.78 × 18,991.12
  4. Step 4: Simplify right side
    20,018.92x = 570,565,031.23
  5. Step 5: Solve for x
    x = 570,565,031.23/20,018.92
  6. Step 6: Final answer
    x = 28,501.29

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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.