Home / 20,909.26-28,854.48-12,953.44

Finding the Fourth Proportional to 20,909.26, 28,854.48 and 12,953.44

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Solution

The fourth proportional to 20,909.26, 28,854.48 and 12,953.44 is: 17,875.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.26 : 28,854.48 = 12,953.44 : x
  2. Step 2: Convert to fraction form
    20,909.26/28,854.48 = 12,953.44/x
  3. Step 3: Cross multiply
    20,909.26x = 28,854.48 × 12,953.44
  4. Step 4: Simplify right side
    20,909.26x = 373,764,751.85
  5. Step 5: Solve for x
    x = 373,764,751.85/20,909.26
  6. Step 6: Final answer
    x = 17,875.56

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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.