Home / 31,358.96-47,021.88-13,820.48

Finding the Fourth Proportional to 31,358.96, 47,021.88 and 13,820.48

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Solution

The fourth proportional to 31,358.96, 47,021.88 and 13,820.48 is: 20,723.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,358.96 : 47,021.88 = 13,820.48 : x
  2. Step 2: Convert to fraction form
    31,358.96/47,021.88 = 13,820.48/x
  3. Step 3: Cross multiply
    31,358.96x = 47,021.88 × 13,820.48
  4. Step 4: Simplify right side
    31,358.96x = 649,864,952.10
  5. Step 5: Solve for x
    x = 649,864,952.10/31,358.96
  6. Step 6: Final answer
    x = 20,723.42

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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.