Home / 18,984.34-28,460.30-13,420.18

Finding the Fourth Proportional to 18,984.34, 28,460.30 and 13,420.18

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Solution

The fourth proportional to 18,984.34, 28,460.30 and 13,420.18 is: 20,118.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.34 : 28,460.30 = 13,420.18 : x
  2. Step 2: Convert to fraction form
    18,984.34/28,460.30 = 13,420.18/x
  3. Step 3: Cross multiply
    18,984.34x = 28,460.30 × 13,420.18
  4. Step 4: Simplify right side
    18,984.34x = 381,942,348.85
  5. Step 5: Solve for x
    x = 381,942,348.85/18,984.34
  6. Step 6: Final answer
    x = 20,118.81

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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.