Home / 20,845.55-28,769.28-11,894.34

Finding the Fourth Proportional to 20,845.55, 28,769.28 and 11,894.34

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Solution

The fourth proportional to 20,845.55, 28,769.28 and 11,894.34 is: 16,415.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.55 : 28,769.28 = 11,894.34 : x
  2. Step 2: Convert to fraction form
    20,845.55/28,769.28 = 11,894.34/x
  3. Step 3: Cross multiply
    20,845.55x = 28,769.28 × 11,894.34
  4. Step 4: Simplify right side
    20,845.55x = 342,191,661.16
  5. Step 5: Solve for x
    x = 342,191,661.16/20,845.55
  6. Step 6: Final answer
    x = 16,415.57

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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.