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Finding the Fourth Proportional to 13,671.77, 18,867.13 and 8,009.87

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Solution

The fourth proportional to 13,671.77, 18,867.13 and 8,009.87 is: 11,053.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.77 : 18,867.13 = 8,009.87 : x
  2. Step 2: Convert to fraction form
    13,671.77/18,867.13 = 8,009.87/x
  3. Step 3: Cross multiply
    13,671.77x = 18,867.13 × 8,009.87
  4. Step 4: Simplify right side
    13,671.77x = 151,123,144.21
  5. Step 5: Solve for x
    x = 151,123,144.21/13,671.77
  6. Step 6: Final answer
    x = 11,053.67

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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.