Home / 20,812.20-31,247.10-16,434.60

Finding the Fourth Proportional to 20,812.20, 31,247.10 and 16,434.60

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Solution

The fourth proportional to 20,812.20, 31,247.10 and 16,434.60 is: 24,674.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.20 : 31,247.10 = 16,434.60 : x
  2. Step 2: Convert to fraction form
    20,812.20/31,247.10 = 16,434.60/x
  3. Step 3: Cross multiply
    20,812.20x = 31,247.10 × 16,434.60
  4. Step 4: Simplify right side
    20,812.20x = 513,533,589.66
  5. Step 5: Solve for x
    x = 513,533,589.66/20,812.20
  6. Step 6: Final answer
    x = 24,674.64

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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.