Home / 12,902.20-19,382.10-12,556.60

Finding the Fourth Proportional to 12,902.20, 19,382.10 and 12,556.60

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Solution

The fourth proportional to 12,902.20, 19,382.10 and 12,556.60 is: 18,862.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,902.20 : 19,382.10 = 12,556.60 : x
  2. Step 2: Convert to fraction form
    12,902.20/19,382.10 = 12,556.60/x
  3. Step 3: Cross multiply
    12,902.20x = 19,382.10 × 12,556.60
  4. Step 4: Simplify right side
    12,902.20x = 243,373,276.86
  5. Step 5: Solve for x
    x = 243,373,276.86/12,902.20
  6. Step 6: Final answer
    x = 18,862.93

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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.