Home / 20,288.80-30,435.63-8,600.50

Finding the Fourth Proportional to 20,288.80, 30,435.63 and 8,600.50

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Solution

The fourth proportional to 20,288.80, 30,435.63 and 8,600.50 is: 12,901.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.80 : 30,435.63 = 8,600.50 : x
  2. Step 2: Convert to fraction form
    20,288.80/30,435.63 = 8,600.50/x
  3. Step 3: Cross multiply
    20,288.80x = 30,435.63 × 8,600.50
  4. Step 4: Simplify right side
    20,288.80x = 261,761,635.82
  5. Step 5: Solve for x
    x = 261,761,635.82/20,288.80
  6. Step 6: Final answer
    x = 12,901.78

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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.