Home / 20,653.08-28,500.68-11,221.68

Finding the Fourth Proportional to 20,653.08, 28,500.68 and 11,221.68

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Solution

The fourth proportional to 20,653.08, 28,500.68 and 11,221.68 is: 15,485.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.08 : 28,500.68 = 11,221.68 : x
  2. Step 2: Convert to fraction form
    20,653.08/28,500.68 = 11,221.68/x
  3. Step 3: Cross multiply
    20,653.08x = 28,500.68 × 11,221.68
  4. Step 4: Simplify right side
    20,653.08x = 319,825,510.74
  5. Step 5: Solve for x
    x = 319,825,510.74/20,653.08
  6. Step 6: Final answer
    x = 15,485.61

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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.