Home / 21,169.58-31,785.15-15,570.86

Finding the Fourth Proportional to 21,169.58, 31,785.15 and 15,570.86

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Solution

The fourth proportional to 21,169.58, 31,785.15 and 15,570.86 is: 23,378.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.58 : 31,785.15 = 15,570.86 : x
  2. Step 2: Convert to fraction form
    21,169.58/31,785.15 = 15,570.86/x
  3. Step 3: Cross multiply
    21,169.58x = 31,785.15 × 15,570.86
  4. Step 4: Simplify right side
    21,169.58x = 494,922,120.73
  5. Step 5: Solve for x
    x = 494,922,120.73/21,169.58
  6. Step 6: Final answer
    x = 23,378.93

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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.