Home / 20,666.81-28,520.24-11,235.38

Finding the Fourth Proportional to 20,666.81, 28,520.24 and 11,235.38

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Solution

The fourth proportional to 20,666.81, 28,520.24 and 11,235.38 is: 15,504.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.81 : 28,520.24 = 11,235.38 : x
  2. Step 2: Convert to fraction form
    20,666.81/28,520.24 = 11,235.38/x
  3. Step 3: Cross multiply
    20,666.81x = 28,520.24 × 11,235.38
  4. Step 4: Simplify right side
    20,666.81x = 320,435,535.31
  5. Step 5: Solve for x
    x = 320,435,535.31/20,666.81
  6. Step 6: Final answer
    x = 15,504.84

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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.