Home / 20,419.52-28,178.84-11,927.48

Finding the Fourth Proportional to 20,419.52, 28,178.84 and 11,927.48

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Solution

The fourth proportional to 20,419.52, 28,178.84 and 11,927.48 is: 16,459.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.52 : 28,178.84 = 11,927.48 : x
  2. Step 2: Convert to fraction form
    20,419.52/28,178.84 = 11,927.48/x
  3. Step 3: Cross multiply
    20,419.52x = 28,178.84 × 11,927.48
  4. Step 4: Simplify right side
    20,419.52x = 336,102,349.99
  5. Step 5: Solve for x
    x = 336,102,349.99/20,419.52
  6. Step 6: Final answer
    x = 16,459.86

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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.