Home / 20,665.20-31,011.84-13,630.08

Finding the Fourth Proportional to 20,665.20, 31,011.84 and 13,630.08

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Solution

The fourth proportional to 20,665.20, 31,011.84 and 13,630.08 is: 20,454.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.20 : 31,011.84 = 13,630.08 : x
  2. Step 2: Convert to fraction form
    20,665.20/31,011.84 = 13,630.08/x
  3. Step 3: Cross multiply
    20,665.20x = 31,011.84 × 13,630.08
  4. Step 4: Simplify right side
    20,665.20x = 422,693,860.15
  5. Step 5: Solve for x
    x = 422,693,860.15/20,665.20
  6. Step 6: Final answer
    x = 20,454.38

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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.