Home / 20,829.18-28,743.56-11,879.57

Finding the Fourth Proportional to 20,829.18, 28,743.56 and 11,879.57

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Solution

The fourth proportional to 20,829.18, 28,743.56 and 11,879.57 is: 16,393.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.18 : 28,743.56 = 11,879.57 : x
  2. Step 2: Convert to fraction form
    20,829.18/28,743.56 = 11,879.57/x
  3. Step 3: Cross multiply
    20,829.18x = 28,743.56 × 11,879.57
  4. Step 4: Simplify right side
    20,829.18x = 341,461,085.52
  5. Step 5: Solve for x
    x = 341,461,085.52/20,829.18
  6. Step 6: Final answer
    x = 16,393.40

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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.