Home / 20,932.68-28,879.96-12,972.00

Finding the Fourth Proportional to 20,932.68, 28,879.96 and 12,972.00

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Solution

The fourth proportional to 20,932.68, 28,879.96 and 12,972.00 is: 17,896.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.68 : 28,879.96 = 12,972.00 : x
  2. Step 2: Convert to fraction form
    20,932.68/28,879.96 = 12,972.00/x
  3. Step 3: Cross multiply
    20,932.68x = 28,879.96 × 12,972.00
  4. Step 4: Simplify right side
    20,932.68x = 374,630,941.31
  5. Step 5: Solve for x
    x = 374,630,941.31/20,932.68
  6. Step 6: Final answer
    x = 17,896.94

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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.