Home / 31,912.80-47,869.20-11,136.30

Finding the Fourth Proportional to 31,912.80, 47,869.20 and 11,136.30

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Solution

The fourth proportional to 31,912.80, 47,869.20 and 11,136.30 is: 16,704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,912.80 : 47,869.20 = 11,136.30 : x
  2. Step 2: Convert to fraction form
    31,912.80/47,869.20 = 11,136.30/x
  3. Step 3: Cross multiply
    31,912.80x = 47,869.20 × 11,136.30
  4. Step 4: Simplify right side
    31,912.80x = 533,085,771.96
  5. Step 5: Solve for x
    x = 533,085,771.96/31,912.80
  6. Step 6: Final answer
    x = 16,704.45

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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.