Home / 20,864.72-31,287.36-11,008.64

Finding the Fourth Proportional to 20,864.72, 31,287.36 and 11,008.64

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Solution

The fourth proportional to 20,864.72, 31,287.36 and 11,008.64 is: 16,507.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.72 : 31,287.36 = 11,008.64 : x
  2. Step 2: Convert to fraction form
    20,864.72/31,287.36 = 11,008.64/x
  3. Step 3: Cross multiply
    20,864.72x = 31,287.36 × 11,008.64
  4. Step 4: Simplify right side
    20,864.72x = 344,431,282.79
  5. Step 5: Solve for x
    x = 344,431,282.79/20,864.72
  6. Step 6: Final answer
    x = 16,507.83

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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.