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Finding the Fourth Proportional to 31,170.80, 46,704.90 and 18,000.20

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Solution

The fourth proportional to 31,170.80, 46,704.90 and 18,000.20 is: 26,970.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,170.80 : 46,704.90 = 18,000.20 : x
  2. Step 2: Convert to fraction form
    31,170.80/46,704.90 = 18,000.20/x
  3. Step 3: Cross multiply
    31,170.80x = 46,704.90 × 18,000.20
  4. Step 4: Simplify right side
    31,170.80x = 840,697,540.98
  5. Step 5: Solve for x
    x = 840,697,540.98/31,170.80
  6. Step 6: Final answer
    x = 26,970.68

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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.