Home / 31,400.10-47,136.60-18,934.20

Finding the Fourth Proportional to 31,400.10, 47,136.60 and 18,934.20

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Solution

The fourth proportional to 31,400.10, 47,136.60 and 18,934.20 is: 28,423.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,400.10 : 47,136.60 = 18,934.20 : x
  2. Step 2: Convert to fraction form
    31,400.10/47,136.60 = 18,934.20/x
  3. Step 3: Cross multiply
    31,400.10x = 47,136.60 × 18,934.20
  4. Step 4: Simplify right side
    31,400.10x = 892,493,811.72
  5. Step 5: Solve for x
    x = 892,493,811.72/31,400.10
  6. Step 6: Final answer
    x = 28,423.28

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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.