Home / 15,204.89-20,982.55-8,490.64

Finding the Fourth Proportional to 15,204.89, 20,982.55 and 8,490.64

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Solution

The fourth proportional to 15,204.89, 20,982.55 and 8,490.64 is: 11,716.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.89 : 20,982.55 = 8,490.64 : x
  2. Step 2: Convert to fraction form
    15,204.89/20,982.55 = 8,490.64/x
  3. Step 3: Cross multiply
    15,204.89x = 20,982.55 × 8,490.64
  4. Step 4: Simplify right side
    15,204.89x = 178,155,173.42
  5. Step 5: Solve for x
    x = 178,155,173.42/15,204.89
  6. Step 6: Final answer
    x = 11,716.97

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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.