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Finding the Fourth Proportional to 18,874.81, 26,052.20 and 12,904.30

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Solution

The fourth proportional to 18,874.81, 26,052.20 and 12,904.30 is: 17,811.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,874.81 : 26,052.20 = 12,904.30 : x
  2. Step 2: Convert to fraction form
    18,874.81/26,052.20 = 12,904.30/x
  3. Step 3: Cross multiply
    18,874.81x = 26,052.20 × 12,904.30
  4. Step 4: Simplify right side
    18,874.81x = 336,185,404.46
  5. Step 5: Solve for x
    x = 336,185,404.46/18,874.81
  6. Step 6: Final answer
    x = 17,811.33

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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.