Home / 20,790.05-28,686.02-11,835.20

Finding the Fourth Proportional to 20,790.05, 28,686.02 and 11,835.20

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Solution

The fourth proportional to 20,790.05, 28,686.02 and 11,835.20 is: 16,330.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.05 : 28,686.02 = 11,835.20 : x
  2. Step 2: Convert to fraction form
    20,790.05/28,686.02 = 11,835.20/x
  3. Step 3: Cross multiply
    20,790.05x = 28,686.02 × 11,835.20
  4. Step 4: Simplify right side
    20,790.05x = 339,504,635.08
  5. Step 5: Solve for x
    x = 339,504,635.08/20,790.05
  6. Step 6: Final answer
    x = 16,330.15

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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.