Home / 18,995.56-28,489.98-5,145.64

Finding the Fourth Proportional to 18,995.56, 28,489.98 and 5,145.64

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Solution

The fourth proportional to 18,995.56, 28,489.98 and 5,145.64 is: 7,717.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.56 : 28,489.98 = 5,145.64 : x
  2. Step 2: Convert to fraction form
    18,995.56/28,489.98 = 5,145.64/x
  3. Step 3: Cross multiply
    18,995.56x = 28,489.98 × 5,145.64
  4. Step 4: Simplify right side
    18,995.56x = 146,599,180.69
  5. Step 5: Solve for x
    x = 146,599,180.69/18,995.56
  6. Step 6: Final answer
    x = 7,717.55

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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.