Home / 13,168.20-19,781.10-12,678.60

Finding the Fourth Proportional to 13,168.20, 19,781.10 and 12,678.60

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Solution

The fourth proportional to 13,168.20, 19,781.10 and 12,678.60 is: 19,045.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168.20 : 19,781.10 = 12,678.60 : x
  2. Step 2: Convert to fraction form
    13,168.20/19,781.10 = 12,678.60/x
  3. Step 3: Cross multiply
    13,168.20x = 19,781.10 × 12,678.60
  4. Step 4: Simplify right side
    13,168.20x = 250,796,654.46
  5. Step 5: Solve for x
    x = 250,796,654.46/13,168.20
  6. Step 6: Final answer
    x = 19,045.63

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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.