Home / 20,932.96-28,887.56-11,980.61

Finding the Fourth Proportional to 20,932.96, 28,887.56 and 11,980.61

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Solution

The fourth proportional to 20,932.96, 28,887.56 and 11,980.61 is: 16,533.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.96 : 28,887.56 = 11,980.61 : x
  2. Step 2: Convert to fraction form
    20,932.96/28,887.56 = 11,980.61/x
  3. Step 3: Cross multiply
    20,932.96x = 28,887.56 × 11,980.61
  4. Step 4: Simplify right side
    20,932.96x = 346,090,590.21
  5. Step 5: Solve for x
    x = 346,090,590.21/20,932.96
  6. Step 6: Final answer
    x = 16,533.28

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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.