Home / 20,928.96-31,393.92-7,078.08

Finding the Fourth Proportional to 20,928.96, 31,393.92 and 7,078.08

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Solution

The fourth proportional to 20,928.96, 31,393.92 and 7,078.08 is: 10,617.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.96 : 31,393.92 = 7,078.08 : x
  2. Step 2: Convert to fraction form
    20,928.96/31,393.92 = 7,078.08/x
  3. Step 3: Cross multiply
    20,928.96x = 31,393.92 × 7,078.08
  4. Step 4: Simplify right side
    20,928.96x = 222,208,677.27
  5. Step 5: Solve for x
    x = 222,208,677.27/20,928.96
  6. Step 6: Final answer
    x = 10,617.28

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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.