Home / 28,639.76-39,499.44-20,169.98

Finding the Fourth Proportional to 28,639.76, 39,499.44 and 20,169.98

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Solution

The fourth proportional to 28,639.76, 39,499.44 and 20,169.98 is: 27,818.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,639.76 : 39,499.44 = 20,169.98 : x
  2. Step 2: Convert to fraction form
    28,639.76/39,499.44 = 20,169.98/x
  3. Step 3: Cross multiply
    28,639.76x = 39,499.44 × 20,169.98
  4. Step 4: Simplify right side
    28,639.76x = 796,702,914.81
  5. Step 5: Solve for x
    x = 796,702,914.81/28,639.76
  6. Step 6: Final answer
    x = 27,818.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.