Home / 20,652.86-28,500.59-11,221.35

Finding the Fourth Proportional to 20,652.86, 28,500.59 and 11,221.35

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Solution

The fourth proportional to 20,652.86, 28,500.59 and 11,221.35 is: 15,485.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.86 : 28,500.59 = 11,221.35 : x
  2. Step 2: Convert to fraction form
    20,652.86/28,500.59 = 11,221.35/x
  3. Step 3: Cross multiply
    20,652.86x = 28,500.59 × 11,221.35
  4. Step 4: Simplify right side
    20,652.86x = 319,815,095.60
  5. Step 5: Solve for x
    x = 319,815,095.60/20,652.86
  6. Step 6: Final answer
    x = 15,485.27

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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.