Home / 20,779.32-28,675.31-11,347.88

Finding the Fourth Proportional to 20,779.32, 28,675.31 and 11,347.88

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Solution

The fourth proportional to 20,779.32, 28,675.31 and 11,347.88 is: 15,659.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.32 : 28,675.31 = 11,347.88 : x
  2. Step 2: Convert to fraction form
    20,779.32/28,675.31 = 11,347.88/x
  3. Step 3: Cross multiply
    20,779.32x = 28,675.31 × 11,347.88
  4. Step 4: Simplify right side
    20,779.32x = 325,403,776.73
  5. Step 5: Solve for x
    x = 325,403,776.73/20,779.32
  6. Step 6: Final answer
    x = 15,659.98

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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.