Home / 13,572.09-20,358.39-8,921.75

Finding the Fourth Proportional to 13,572.09, 20,358.39 and 8,921.75

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Solution

The fourth proportional to 13,572.09, 20,358.39 and 8,921.75 is: 13,382.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.09 : 20,358.39 = 8,921.75 : x
  2. Step 2: Convert to fraction form
    13,572.09/20,358.39 = 8,921.75/x
  3. Step 3: Cross multiply
    13,572.09x = 20,358.39 × 8,921.75
  4. Step 4: Simplify right side
    13,572.09x = 181,632,364.19
  5. Step 5: Solve for x
    x = 181,632,364.19/13,572.09
  6. Step 6: Final answer
    x = 13,382.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.