Home / 27,720.05-38,249.27-15,783.62

Finding the Fourth Proportional to 27,720.05, 38,249.27 and 15,783.62

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Solution

The fourth proportional to 27,720.05, 38,249.27 and 15,783.62 is: 21,778.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.05 : 38,249.27 = 15,783.62 : x
  2. Step 2: Convert to fraction form
    27,720.05/38,249.27 = 15,783.62/x
  3. Step 3: Cross multiply
    27,720.05x = 38,249.27 × 15,783.62
  4. Step 4: Simplify right side
    27,720.05x = 603,711,672.79
  5. Step 5: Solve for x
    x = 603,711,672.79/27,720.05
  6. Step 6: Final answer
    x = 21,778.89

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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.