Home / 28,670.15-39,562.90-15,922.31

Finding the Fourth Proportional to 28,670.15, 39,562.90 and 15,922.31

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Solution

The fourth proportional to 28,670.15, 39,562.90 and 15,922.31 is: 21,971.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,670.15 : 39,562.90 = 15,922.31 : x
  2. Step 2: Convert to fraction form
    28,670.15/39,562.90 = 15,922.31/x
  3. Step 3: Cross multiply
    28,670.15x = 39,562.90 × 15,922.31
  4. Step 4: Simplify right side
    28,670.15x = 629,932,520.68
  5. Step 5: Solve for x
    x = 629,932,520.68/28,670.15
  6. Step 6: Final answer
    x = 21,971.72

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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.