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Finding the Fourth Proportional to 18,381, 25,374.69 and 12,329.04

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Solution

The fourth proportional to 18,381, 25,374.69 and 12,329.04 is: 17,020.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,381 : 25,374.69 = 12,329.04 : x
  2. Step 2: Convert to fraction form
    18,381/25,374.69 = 12,329.04/x
  3. Step 3: Cross multiply
    18,381x = 25,374.69 × 12,329.04
  4. Step 4: Simplify right side
    18,381x = 312,845,568.00
  5. Step 5: Solve for x
    x = 312,845,568.00/18,381
  6. Step 6: Final answer
    x = 17,020.05

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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.