Home / 20,779.56-28,674.74-11,346.36

Finding the Fourth Proportional to 20,779.56, 28,674.74 and 11,346.36

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Solution

The fourth proportional to 20,779.56, 28,674.74 and 11,346.36 is: 15,657.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.56 : 28,674.74 = 11,346.36 : x
  2. Step 2: Convert to fraction form
    20,779.56/28,674.74 = 11,346.36/x
  3. Step 3: Cross multiply
    20,779.56x = 28,674.74 × 11,346.36
  4. Step 4: Simplify right side
    20,779.56x = 325,353,922.95
  5. Step 5: Solve for x
    x = 325,353,922.95/20,779.56
  6. Step 6: Final answer
    x = 15,657.40

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Double scale
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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.