Home / 20,639.25-28,482.44-11,686.56

Finding the Fourth Proportional to 20,639.25, 28,482.44 and 11,686.56

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Solution

The fourth proportional to 20,639.25, 28,482.44 and 11,686.56 is: 16,127.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.25 : 28,482.44 = 11,686.56 : x
  2. Step 2: Convert to fraction form
    20,639.25/28,482.44 = 11,686.56/x
  3. Step 3: Cross multiply
    20,639.25x = 28,482.44 × 11,686.56
  4. Step 4: Simplify right side
    20,639.25x = 332,861,630.81
  5. Step 5: Solve for x
    x = 332,861,630.81/20,639.25
  6. Step 6: Final answer
    x = 16,127.61

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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.