Home / 20,971.08-28,939.56-12,023.82

Finding the Fourth Proportional to 20,971.08, 28,939.56 and 12,023.82

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Solution

The fourth proportional to 20,971.08, 28,939.56 and 12,023.82 is: 16,592.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.08 : 28,939.56 = 12,023.82 : x
  2. Step 2: Convert to fraction form
    20,971.08/28,939.56 = 12,023.82/x
  3. Step 3: Cross multiply
    20,971.08x = 28,939.56 × 12,023.82
  4. Step 4: Simplify right side
    20,971.08x = 347,964,060.32
  5. Step 5: Solve for x
    x = 347,964,060.32/20,971.08
  6. Step 6: Final answer
    x = 16,592.57

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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.