Home / 20,485.81-28,273.11-11,535.06

Finding the Fourth Proportional to 20,485.81, 28,273.11 and 11,535.06

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Solution

The fourth proportional to 20,485.81, 28,273.11 and 11,535.06 is: 15,919.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.81 : 28,273.11 = 11,535.06 : x
  2. Step 2: Convert to fraction form
    20,485.81/28,273.11 = 11,535.06/x
  3. Step 3: Cross multiply
    20,485.81x = 28,273.11 × 11,535.06
  4. Step 4: Simplify right side
    20,485.81x = 326,132,020.24
  5. Step 5: Solve for x
    x = 326,132,020.24/20,485.81
  6. Step 6: Final answer
    x = 15,919.90

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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.