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Finding the Fourth Proportional to 18,871.12, 26,043.40 and 12,594

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Solution

The fourth proportional to 18,871.12, 26,043.40 and 12,594 is: 17,380.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.12 : 26,043.40 = 12,594 : x
  2. Step 2: Convert to fraction form
    18,871.12/26,043.40 = 12,594/x
  3. Step 3: Cross multiply
    18,871.12x = 26,043.40 × 12,594
  4. Step 4: Simplify right side
    18,871.12x = 327,990,579.60
  5. Step 5: Solve for x
    x = 327,990,579.60/18,871.12
  6. Step 6: Final answer
    x = 17,380.56

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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.