Home / 20,814.57-28,721.76-12,316.95

Finding the Fourth Proportional to 20,814.57, 28,721.76 and 12,316.95

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Solution

The fourth proportional to 20,814.57, 28,721.76 and 12,316.95 is: 16,996.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.57 : 28,721.76 = 12,316.95 : x
  2. Step 2: Convert to fraction form
    20,814.57/28,721.76 = 12,316.95/x
  3. Step 3: Cross multiply
    20,814.57x = 28,721.76 × 12,316.95
  4. Step 4: Simplify right side
    20,814.57x = 353,764,481.83
  5. Step 5: Solve for x
    x = 353,764,481.83/20,814.57
  6. Step 6: Final answer
    x = 16,996.00

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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.