Home / 13,278.13-19,914.55-8,520.21

Finding the Fourth Proportional to 13,278.13, 19,914.55 and 8,520.21

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Solution

The fourth proportional to 13,278.13, 19,914.55 and 8,520.21 is: 12,778.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.13 : 19,914.55 = 8,520.21 : x
  2. Step 2: Convert to fraction form
    13,278.13/19,914.55 = 8,520.21/x
  3. Step 3: Cross multiply
    13,278.13x = 19,914.55 × 8,520.21
  4. Step 4: Simplify right side
    13,278.13x = 169,676,201.43
  5. Step 5: Solve for x
    x = 169,676,201.43/13,278.13
  6. Step 6: Final answer
    x = 12,778.62

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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.