Home / 20,789.16-28,688.40-11,837.94

Finding the Fourth Proportional to 20,789.16, 28,688.40 and 11,837.94

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Solution

The fourth proportional to 20,789.16, 28,688.40 and 11,837.94 is: 16,335.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.16 : 28,688.40 = 11,837.94 : x
  2. Step 2: Convert to fraction form
    20,789.16/28,688.40 = 11,837.94/x
  3. Step 3: Cross multiply
    20,789.16x = 28,688.40 × 11,837.94
  4. Step 4: Simplify right side
    20,789.16x = 339,611,557.90
  5. Step 5: Solve for x
    x = 339,611,557.90/20,789.16
  6. Step 6: Final answer
    x = 16,335.99

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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.