Home / 20,835.20-31,204.20-14,225.60

Finding the Fourth Proportional to 20,835.20, 31,204.20 and 14,225.60

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Solution

The fourth proportional to 20,835.20, 31,204.20 and 14,225.60 is: 21,305.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.20 : 31,204.20 = 14,225.60 : x
  2. Step 2: Convert to fraction form
    20,835.20/31,204.20 = 14,225.60/x
  3. Step 3: Cross multiply
    20,835.20x = 31,204.20 × 14,225.60
  4. Step 4: Simplify right side
    20,835.20x = 443,898,467.52
  5. Step 5: Solve for x
    x = 443,898,467.52/20,835.20
  6. Step 6: Final answer
    x = 21,305.22

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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.