Home / 20,487.12-28,272.51-11,994.54

Finding the Fourth Proportional to 20,487.12, 28,272.51 and 11,994.54

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Solution

The fourth proportional to 20,487.12, 28,272.51 and 11,994.54 is: 16,552.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.12 : 28,272.51 = 11,994.54 : x
  2. Step 2: Convert to fraction form
    20,487.12/28,272.51 = 11,994.54/x
  3. Step 3: Cross multiply
    20,487.12x = 28,272.51 × 11,994.54
  4. Step 4: Simplify right side
    20,487.12x = 339,115,752.10
  5. Step 5: Solve for x
    x = 339,115,752.10/20,487.12
  6. Step 6: Final answer
    x = 16,552.63

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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.