Home / 20,779.40-28,675.80-11,348.24

Finding the Fourth Proportional to 20,779.40, 28,675.80 and 11,348.24

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Solution

The fourth proportional to 20,779.40, 28,675.80 and 11,348.24 is: 15,660.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.40 : 28,675.80 = 11,348.24 : x
  2. Step 2: Convert to fraction form
    20,779.40/28,675.80 = 11,348.24/x
  3. Step 3: Cross multiply
    20,779.40x = 28,675.80 × 11,348.24
  4. Step 4: Simplify right side
    20,779.40x = 325,419,860.59
  5. Step 5: Solve for x
    x = 325,419,860.59/20,779.40
  6. Step 6: Final answer
    x = 15,660.70

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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.