Home / 20,666.20-31,013.34-13,631.08

Finding the Fourth Proportional to 20,666.20, 31,013.34 and 13,631.08

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Solution

The fourth proportional to 20,666.20, 31,013.34 and 13,631.08 is: 20,455.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.20 : 31,013.34 = 13,631.08 : x
  2. Step 2: Convert to fraction form
    20,666.20/31,013.34 = 13,631.08/x
  3. Step 3: Cross multiply
    20,666.20x = 31,013.34 × 13,631.08
  4. Step 4: Simplify right side
    20,666.20x = 422,745,318.61
  5. Step 5: Solve for x
    x = 422,745,318.61/20,666.20
  6. Step 6: Final answer
    x = 20,455.88

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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.