Home / 20,751.19-28,628.49-12,779.58

Finding the Fourth Proportional to 20,751.19, 28,628.49 and 12,779.58

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Solution

The fourth proportional to 20,751.19, 28,628.49 and 12,779.58 is: 17,630.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.19 : 28,628.49 = 12,779.58 : x
  2. Step 2: Convert to fraction form
    20,751.19/28,628.49 = 12,779.58/x
  3. Step 3: Cross multiply
    20,751.19x = 28,628.49 × 12,779.58
  4. Step 4: Simplify right side
    20,751.19x = 365,860,078.23
  5. Step 5: Solve for x
    x = 365,860,078.23/20,751.19
  6. Step 6: Final answer
    x = 17,630.80

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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.