Home / 20,675.69-28,538.95-11,729.14

Finding the Fourth Proportional to 20,675.69, 28,538.95 and 11,729.14

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Solution

The fourth proportional to 20,675.69, 28,538.95 and 11,729.14 is: 16,189.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.69 : 28,538.95 = 11,729.14 : x
  2. Step 2: Convert to fraction form
    20,675.69/28,538.95 = 11,729.14/x
  3. Step 3: Cross multiply
    20,675.69x = 28,538.95 × 11,729.14
  4. Step 4: Simplify right side
    20,675.69x = 334,737,340.00
  5. Step 5: Solve for x
    x = 334,737,340.00/20,675.69
  6. Step 6: Final answer
    x = 16,189.90

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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.