Home / 20,101.40-30,162.90-8,415.80

Finding the Fourth Proportional to 20,101.40, 30,162.90 and 8,415.80

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Solution

The fourth proportional to 20,101.40, 30,162.90 and 8,415.80 is: 12,628.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,101.40 : 30,162.90 = 8,415.80 : x
  2. Step 2: Convert to fraction form
    20,101.40/30,162.90 = 8,415.80/x
  3. Step 3: Cross multiply
    20,101.40x = 30,162.90 × 8,415.80
  4. Step 4: Simplify right side
    20,101.40x = 253,844,933.82
  5. Step 5: Solve for x
    x = 253,844,933.82/20,101.40
  6. Step 6: Final answer
    x = 12,628.22

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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.