Home / 31,638.21-47,358.49-21,116.85

Finding the Fourth Proportional to 31,638.21, 47,358.49 and 21,116.85

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Solution

The fourth proportional to 31,638.21, 47,358.49 and 21,116.85 is: 31,609.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,638.21 : 47,358.49 = 21,116.85 : x
  2. Step 2: Convert to fraction form
    31,638.21/47,358.49 = 21,116.85/x
  3. Step 3: Cross multiply
    31,638.21x = 47,358.49 × 21,116.85
  4. Step 4: Simplify right side
    31,638.21x = 1,000,062,129.56
  5. Step 5: Solve for x
    x = 1,000,062,129.56/31,638.21
  6. Step 6: Final answer
    x = 31,609.31

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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.