Home / 20,928.08-28,885.73-11,980.75

Finding the Fourth Proportional to 20,928.08, 28,885.73 and 11,980.75

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Solution

The fourth proportional to 20,928.08, 28,885.73 and 11,980.75 is: 16,536.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.08 : 28,885.73 = 11,980.75 : x
  2. Step 2: Convert to fraction form
    20,928.08/28,885.73 = 11,980.75/x
  3. Step 3: Cross multiply
    20,928.08x = 28,885.73 × 11,980.75
  4. Step 4: Simplify right side
    20,928.08x = 346,072,709.70
  5. Step 5: Solve for x
    x = 346,072,709.70/20,928.08
  6. Step 6: Final answer
    x = 16,536.29

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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.