Home / 21,169.08-31,684.86-15,620.13

Finding the Fourth Proportional to 21,169.08, 31,684.86 and 15,620.13

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Solution

The fourth proportional to 21,169.08, 31,684.86 and 15,620.13 is: 23,379.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.08 : 31,684.86 = 15,620.13 : x
  2. Step 2: Convert to fraction form
    21,169.08/31,684.86 = 15,620.13/x
  3. Step 3: Cross multiply
    21,169.08x = 31,684.86 × 15,620.13
  4. Step 4: Simplify right side
    21,169.08x = 494,921,632.23
  5. Step 5: Solve for x
    x = 494,921,632.23/21,169.08
  6. Step 6: Final answer
    x = 23,379.46

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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.