Home / 20,903.48-31,354.88-8,423.22

Finding the Fourth Proportional to 20,903.48, 31,354.88 and 8,423.22

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Solution

The fourth proportional to 20,903.48, 31,354.88 and 8,423.22 is: 12,634.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.48 : 31,354.88 = 8,423.22 : x
  2. Step 2: Convert to fraction form
    20,903.48/31,354.88 = 8,423.22/x
  3. Step 3: Cross multiply
    20,903.48x = 31,354.88 × 8,423.22
  4. Step 4: Simplify right side
    20,903.48x = 264,109,052.31
  5. Step 5: Solve for x
    x = 264,109,052.31/20,903.48
  6. Step 6: Final answer
    x = 12,634.69

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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.