Home / 20,653.03-28,500.42-11,221.39

Finding the Fourth Proportional to 20,653.03, 28,500.42 and 11,221.39

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Solution

The fourth proportional to 20,653.03, 28,500.42 and 11,221.39 is: 15,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.03 : 28,500.42 = 11,221.39 : x
  2. Step 2: Convert to fraction form
    20,653.03/28,500.42 = 11,221.39/x
  3. Step 3: Cross multiply
    20,653.03x = 28,500.42 × 11,221.39
  4. Step 4: Simplify right side
    20,653.03x = 319,814,327.98
  5. Step 5: Solve for x
    x = 319,814,327.98/20,653.03
  6. Step 6: Final answer
    x = 15,485.10

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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.