Home / 13,779.24-20,648.53-8,151.09

Finding the Fourth Proportional to 13,779.24, 20,648.53 and 8,151.09

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Solution

The fourth proportional to 13,779.24, 20,648.53 and 8,151.09 is: 12,214.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,779.24 : 20,648.53 = 8,151.09 : x
  2. Step 2: Convert to fraction form
    13,779.24/20,648.53 = 8,151.09/x
  3. Step 3: Cross multiply
    13,779.24x = 20,648.53 × 8,151.09
  4. Step 4: Simplify right side
    13,779.24x = 168,308,026.40
  5. Step 5: Solve for x
    x = 168,308,026.40/13,779.24
  6. Step 6: Final answer
    x = 12,214.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.