Home / 20,519.96-28,315.50-12,564.44

Finding the Fourth Proportional to 20,519.96, 28,315.50 and 12,564.44

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Solution

The fourth proportional to 20,519.96, 28,315.50 and 12,564.44 is: 17,337.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.96 : 28,315.50 = 12,564.44 : x
  2. Step 2: Convert to fraction form
    20,519.96/28,315.50 = 12,564.44/x
  3. Step 3: Cross multiply
    20,519.96x = 28,315.50 × 12,564.44
  4. Step 4: Simplify right side
    20,519.96x = 355,768,400.82
  5. Step 5: Solve for x
    x = 355,768,400.82/20,519.96
  6. Step 6: Final answer
    x = 17,337.68

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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.