Home / 19,490.20-29,186.70-12,880.60

Finding the Fourth Proportional to 19,490.20, 29,186.70 and 12,880.60

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Solution

The fourth proportional to 19,490.20, 29,186.70 and 12,880.60 is: 19,288.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,490.20 : 29,186.70 = 12,880.60 : x
  2. Step 2: Convert to fraction form
    19,490.20/29,186.70 = 12,880.60/x
  3. Step 3: Cross multiply
    19,490.20x = 29,186.70 × 12,880.60
  4. Step 4: Simplify right side
    19,490.20x = 375,942,208.02
  5. Step 5: Solve for x
    x = 375,942,208.02/19,490.20
  6. Step 6: Final answer
    x = 19,288.78

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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.