Home / 13,380.12-20,066.40-8,442.36

Finding the Fourth Proportional to 13,380.12, 20,066.40 and 8,442.36

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Solution

The fourth proportional to 13,380.12, 20,066.40 and 8,442.36 is: 12,661.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,380.12 : 20,066.40 = 8,442.36 : x
  2. Step 2: Convert to fraction form
    13,380.12/20,066.40 = 8,442.36/x
  3. Step 3: Cross multiply
    13,380.12x = 20,066.40 × 8,442.36
  4. Step 4: Simplify right side
    13,380.12x = 169,407,772.70
  5. Step 5: Solve for x
    x = 169,407,772.70/13,380.12
  6. Step 6: Final answer
    x = 12,661.15

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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.