Home / 31,604.40-47,344.20-20,518.80

Finding the Fourth Proportional to 31,604.40, 47,344.20 and 20,518.80

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Solution

The fourth proportional to 31,604.40, 47,344.20 and 20,518.80 is: 30,737.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,604.40 : 47,344.20 = 20,518.80 : x
  2. Step 2: Convert to fraction form
    31,604.40/47,344.20 = 20,518.80/x
  3. Step 3: Cross multiply
    31,604.40x = 47,344.20 × 20,518.80
  4. Step 4: Simplify right side
    31,604.40x = 971,446,170.96
  5. Step 5: Solve for x
    x = 971,446,170.96/31,604.40
  6. Step 6: Final answer
    x = 30,737.69

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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.