Home / 20,795.76-28,689-14,078.94

Finding the Fourth Proportional to 20,795.76, 28,689 and 14,078.94

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Solution

The fourth proportional to 20,795.76, 28,689 and 14,078.94 is: 19,422.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.76 : 28,689 = 14,078.94 : x
  2. Step 2: Convert to fraction form
    20,795.76/28,689 = 14,078.94/x
  3. Step 3: Cross multiply
    20,795.76x = 28,689 × 14,078.94
  4. Step 4: Simplify right side
    20,795.76x = 403,910,709.66
  5. Step 5: Solve for x
    x = 403,910,709.66/20,795.76
  6. Step 6: Final answer
    x = 19,422.74

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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.