Home / 20,872.04-31,308-13,865.72

Finding the Fourth Proportional to 20,872.04, 31,308 and 13,865.72

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Solution

The fourth proportional to 20,872.04, 31,308 and 13,865.72 is: 20,798.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.04 : 31,308 = 13,865.72 : x
  2. Step 2: Convert to fraction form
    20,872.04/31,308 = 13,865.72/x
  3. Step 3: Cross multiply
    20,872.04x = 31,308 × 13,865.72
  4. Step 4: Simplify right side
    20,872.04x = 434,107,961.76
  5. Step 5: Solve for x
    x = 434,107,961.76/20,872.04
  6. Step 6: Final answer
    x = 20,798.54

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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.