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Finding the Fourth Proportional to 13,688.56, 18,894.90 and 8,025.13

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Solution

The fourth proportional to 13,688.56, 18,894.90 and 8,025.13 is: 11,077.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.56 : 18,894.90 = 8,025.13 : x
  2. Step 2: Convert to fraction form
    13,688.56/18,894.90 = 8,025.13/x
  3. Step 3: Cross multiply
    13,688.56x = 18,894.90 × 8,025.13
  4. Step 4: Simplify right side
    13,688.56x = 151,634,028.84
  5. Step 5: Solve for x
    x = 151,634,028.84/13,688.56
  6. Step 6: Final answer
    x = 11,077.43

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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.