Home / 20,812.08-31,156.60-13,394.64

Finding the Fourth Proportional to 20,812.08, 31,156.60 and 13,394.64

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Solution

The fourth proportional to 20,812.08, 31,156.60 and 13,394.64 is: 20,052.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.08 : 31,156.60 = 13,394.64 : x
  2. Step 2: Convert to fraction form
    20,812.08/31,156.60 = 13,394.64/x
  3. Step 3: Cross multiply
    20,812.08x = 31,156.60 × 13,394.64
  4. Step 4: Simplify right side
    20,812.08x = 417,331,440.62
  5. Step 5: Solve for x
    x = 417,331,440.62/20,812.08
  6. Step 6: Final answer
    x = 20,052.37

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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.