Home / 13,511.81-20,267.78-4,151.75

Finding the Fourth Proportional to 13,511.81, 20,267.78 and 4,151.75

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Solution

The fourth proportional to 13,511.81, 20,267.78 and 4,151.75 is: 6,227.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.81 : 20,267.78 = 4,151.75 : x
  2. Step 2: Convert to fraction form
    13,511.81/20,267.78 = 4,151.75/x
  3. Step 3: Cross multiply
    13,511.81x = 20,267.78 × 4,151.75
  4. Step 4: Simplify right side
    13,511.81x = 84,146,734.86
  5. Step 5: Solve for x
    x = 84,146,734.86/13,511.81
  6. Step 6: Final answer
    x = 6,227.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.