Home / 20,928.32-31,376.64-10,402.64

Finding the Fourth Proportional to 20,928.32, 31,376.64 and 10,402.64

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Solution

The fourth proportional to 20,928.32, 31,376.64 and 10,402.64 is: 15,596.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.32 : 31,376.64 = 10,402.64 : x
  2. Step 2: Convert to fraction form
    20,928.32/31,376.64 = 10,402.64/x
  3. Step 3: Cross multiply
    20,928.32x = 31,376.64 × 10,402.64
  4. Step 4: Simplify right side
    20,928.32x = 326,399,890.33
  5. Step 5: Solve for x
    x = 326,399,890.33/20,928.32
  6. Step 6: Final answer
    x = 15,596.09

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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.