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Finding the Fourth Proportional to 13,076.10, 18,080.01 and 11,415.40

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Solution

The fourth proportional to 13,076.10, 18,080.01 and 11,415.40 is: 15,783.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,076.10 : 18,080.01 = 11,415.40 : x
  2. Step 2: Convert to fraction form
    13,076.10/18,080.01 = 11,415.40/x
  3. Step 3: Cross multiply
    13,076.10x = 18,080.01 × 11,415.40
  4. Step 4: Simplify right side
    13,076.10x = 206,390,500.95
  5. Step 5: Solve for x
    x = 206,390,500.95/13,076.10
  6. Step 6: Final answer
    x = 15,783.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.