Home / 20,908.08-31,362.96-9,218.64

Finding the Fourth Proportional to 20,908.08, 31,362.96 and 9,218.64

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Solution

The fourth proportional to 20,908.08, 31,362.96 and 9,218.64 is: 13,828.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.08 : 31,362.96 = 9,218.64 : x
  2. Step 2: Convert to fraction form
    20,908.08/31,362.96 = 9,218.64/x
  3. Step 3: Cross multiply
    20,908.08x = 31,362.96 × 9,218.64
  4. Step 4: Simplify right side
    20,908.08x = 289,123,837.57
  5. Step 5: Solve for x
    x = 289,123,837.57/20,908.08
  6. Step 6: Final answer
    x = 13,828.33

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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.