Home / 20,799.16-31,206.50-12,485.16

Finding the Fourth Proportional to 20,799.16, 31,206.50 and 12,485.16

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Solution

The fourth proportional to 20,799.16, 31,206.50 and 12,485.16 is: 18,732.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,799.16 : 31,206.50 = 12,485.16 : x
  2. Step 2: Convert to fraction form
    20,799.16/31,206.50 = 12,485.16/x
  3. Step 3: Cross multiply
    20,799.16x = 31,206.50 × 12,485.16
  4. Step 4: Simplify right side
    20,799.16x = 389,618,145.54
  5. Step 5: Solve for x
    x = 389,618,145.54/20,799.16
  6. Step 6: Final answer
    x = 18,732.40

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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.