Home / 20,942.02-31,418.88-8,470.80

Finding the Fourth Proportional to 20,942.02, 31,418.88 and 8,470.80

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Solution

The fourth proportional to 20,942.02, 31,418.88 and 8,470.80 is: 12,708.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.02 : 31,418.88 = 8,470.80 : x
  2. Step 2: Convert to fraction form
    20,942.02/31,418.88 = 8,470.80/x
  3. Step 3: Cross multiply
    20,942.02x = 31,418.88 × 8,470.80
  4. Step 4: Simplify right side
    20,942.02x = 266,143,048.70
  5. Step 5: Solve for x
    x = 266,143,048.70/20,942.02
  6. Step 6: Final answer
    x = 12,708.57

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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.