Home / 18,955.72-28,439.05-7,860.34

Finding the Fourth Proportional to 18,955.72, 28,439.05 and 7,860.34

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Solution

The fourth proportional to 18,955.72, 28,439.05 and 7,860.34 is: 11,792.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,955.72 : 28,439.05 = 7,860.34 : x
  2. Step 2: Convert to fraction form
    18,955.72/28,439.05 = 7,860.34/x
  3. Step 3: Cross multiply
    18,955.72x = 28,439.05 × 7,860.34
  4. Step 4: Simplify right side
    18,955.72x = 223,540,632.91
  5. Step 5: Solve for x
    x = 223,540,632.91/18,955.72
  6. Step 6: Final answer
    x = 11,792.78

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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.