Home / 20,529.20-30,786.60-10,665.20

Finding the Fourth Proportional to 20,529.20, 30,786.60 and 10,665.20

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Solution

The fourth proportional to 20,529.20, 30,786.60 and 10,665.20 is: 15,994.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,529.20 : 30,786.60 = 10,665.20 : x
  2. Step 2: Convert to fraction form
    20,529.20/30,786.60 = 10,665.20/x
  3. Step 3: Cross multiply
    20,529.20x = 30,786.60 × 10,665.20
  4. Step 4: Simplify right side
    20,529.20x = 328,345,246.32
  5. Step 5: Solve for x
    x = 328,345,246.32/20,529.20
  6. Step 6: Final answer
    x = 15,994.06

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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.