Home / 20,829.34-28,746.84-11,879.08

Finding the Fourth Proportional to 20,829.34, 28,746.84 and 11,879.08

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Solution

The fourth proportional to 20,829.34, 28,746.84 and 11,879.08 is: 16,394.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.34 : 28,746.84 = 11,879.08 : x
  2. Step 2: Convert to fraction form
    20,829.34/28,746.84 = 11,879.08/x
  3. Step 3: Cross multiply
    20,829.34x = 28,746.84 × 11,879.08
  4. Step 4: Simplify right side
    20,829.34x = 341,486,012.11
  5. Step 5: Solve for x
    x = 341,486,012.11/20,829.34
  6. Step 6: Final answer
    x = 16,394.47

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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.