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Finding the Fourth Proportional to 18,904.12, 26,087.92 and 10,407.12

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Solution

The fourth proportional to 18,904.12, 26,087.92 and 10,407.12 is: 14,361.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904.12 : 26,087.92 = 10,407.12 : x
  2. Step 2: Convert to fraction form
    18,904.12/26,087.92 = 10,407.12/x
  3. Step 3: Cross multiply
    18,904.12x = 26,087.92 × 10,407.12
  4. Step 4: Simplify right side
    18,904.12x = 271,500,113.99
  5. Step 5: Solve for x
    x = 271,500,113.99/18,904.12
  6. Step 6: Final answer
    x = 14,361.95

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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.