Home / 20,218.88-27,903.18-12,155

Finding the Fourth Proportional to 20,218.88, 27,903.18 and 12,155

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Solution

The fourth proportional to 20,218.88, 27,903.18 and 12,155 is: 16,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,218.88 : 27,903.18 = 12,155 : x
  2. Step 2: Convert to fraction form
    20,218.88/27,903.18 = 12,155/x
  3. Step 3: Cross multiply
    20,218.88x = 27,903.18 × 12,155
  4. Step 4: Simplify right side
    20,218.88x = 339,163,152.90
  5. Step 5: Solve for x
    x = 339,163,152.90/20,218.88
  6. Step 6: Final answer
    x = 16,774.58

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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.