Home / 18,385.68-25,401.96-12,821.52

Finding the Fourth Proportional to 18,385.68, 25,401.96 and 12,821.52

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Solution

The fourth proportional to 18,385.68, 25,401.96 and 12,821.52 is: 17,714.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,385.68 : 25,401.96 = 12,821.52 : x
  2. Step 2: Convert to fraction form
    18,385.68/25,401.96 = 12,821.52/x
  3. Step 3: Cross multiply
    18,385.68x = 25,401.96 × 12,821.52
  4. Step 4: Simplify right side
    18,385.68x = 325,691,738.18
  5. Step 5: Solve for x
    x = 325,691,738.18/18,385.68
  6. Step 6: Final answer
    x = 17,714.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.