Home / 20,854.99-28,774.15-11,899.27

Finding the Fourth Proportional to 20,854.99, 28,774.15 and 11,899.27

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Solution

The fourth proportional to 20,854.99, 28,774.15 and 11,899.27 is: 16,417.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.99 : 28,774.15 = 11,899.27 : x
  2. Step 2: Convert to fraction form
    20,854.99/28,774.15 = 11,899.27/x
  3. Step 3: Cross multiply
    20,854.99x = 28,774.15 × 11,899.27
  4. Step 4: Simplify right side
    20,854.99x = 342,391,379.87
  5. Step 5: Solve for x
    x = 342,391,379.87/20,854.99
  6. Step 6: Final answer
    x = 16,417.72

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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.