Home / 18,984.72-28,460.87-13,420.56

Finding the Fourth Proportional to 18,984.72, 28,460.87 and 13,420.56

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Solution

The fourth proportional to 18,984.72, 28,460.87 and 13,420.56 is: 20,119.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.72 : 28,460.87 = 13,420.56 : x
  2. Step 2: Convert to fraction form
    18,984.72/28,460.87 = 13,420.56/x
  3. Step 3: Cross multiply
    18,984.72x = 28,460.87 × 13,420.56
  4. Step 4: Simplify right side
    18,984.72x = 381,960,813.49
  5. Step 5: Solve for x
    x = 381,960,813.49/18,984.72
  6. Step 6: Final answer
    x = 20,119.38

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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.