Home / 20,779.56-28,675.35-11,348.16

Finding the Fourth Proportional to 20,779.56, 28,675.35 and 11,348.16

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Solution

The fourth proportional to 20,779.56, 28,675.35 and 11,348.16 is: 15,660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.56 : 28,675.35 = 11,348.16 : x
  2. Step 2: Convert to fraction form
    20,779.56/28,675.35 = 11,348.16/x
  3. Step 3: Cross multiply
    20,779.56x = 28,675.35 × 11,348.16
  4. Step 4: Simplify right side
    20,779.56x = 325,412,459.86
  5. Step 5: Solve for x
    x = 325,412,459.86/20,779.56
  6. Step 6: Final answer
    x = 15,660.22

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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.