Home / 20,842.70-28,760.19-12,779.96

Finding the Fourth Proportional to 20,842.70, 28,760.19 and 12,779.96

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Solution

The fourth proportional to 20,842.70, 28,760.19 and 12,779.96 is: 17,634.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.70 : 28,760.19 = 12,779.96 : x
  2. Step 2: Convert to fraction form
    20,842.70/28,760.19 = 12,779.96/x
  3. Step 3: Cross multiply
    20,842.70x = 28,760.19 × 12,779.96
  4. Step 4: Simplify right side
    20,842.70x = 367,554,077.79
  5. Step 5: Solve for x
    x = 367,554,077.79/20,842.70
  6. Step 6: Final answer
    x = 17,634.67

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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.