Home / 20,857.14-28,775.52-11,898.18

Finding the Fourth Proportional to 20,857.14, 28,775.52 and 11,898.18

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Solution

The fourth proportional to 20,857.14, 28,775.52 and 11,898.18 is: 16,415.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.14 : 28,775.52 = 11,898.18 : x
  2. Step 2: Convert to fraction form
    20,857.14/28,775.52 = 11,898.18/x
  3. Step 3: Cross multiply
    20,857.14x = 28,775.52 × 11,898.18
  4. Step 4: Simplify right side
    20,857.14x = 342,376,316.55
  5. Step 5: Solve for x
    x = 342,376,316.55/20,857.14
  6. Step 6: Final answer
    x = 16,415.31

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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.