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Finding the Fourth Proportional to 13,267.17, 18,311.64 and 10,390.17

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Solution

The fourth proportional to 13,267.17, 18,311.64 and 10,390.17 is: 14,340.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,267.17 : 18,311.64 = 10,390.17 : x
  2. Step 2: Convert to fraction form
    13,267.17/18,311.64 = 10,390.17/x
  3. Step 3: Cross multiply
    13,267.17x = 18,311.64 × 10,390.17
  4. Step 4: Simplify right side
    13,267.17x = 190,261,052.58
  5. Step 5: Solve for x
    x = 190,261,052.58/13,267.17
  6. Step 6: Final answer
    x = 14,340.74

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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.