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Finding the Fourth Proportional to 12,381.87, 17,072.58 and 9,026.19

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Solution

The fourth proportional to 12,381.87, 17,072.58 and 9,026.19 is: 12,445.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,381.87 : 17,072.58 = 9,026.19 : x
  2. Step 2: Convert to fraction form
    12,381.87/17,072.58 = 9,026.19/x
  3. Step 3: Cross multiply
    12,381.87x = 17,072.58 × 9,026.19
  4. Step 4: Simplify right side
    12,381.87x = 154,100,384.72
  5. Step 5: Solve for x
    x = 154,100,384.72/12,381.87
  6. Step 6: Final answer
    x = 12,445.64

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Half scale
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Double scale
Find fourth proportional to 12,382.87, 17,073.96 and 9,027.19
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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.