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Finding the Fourth Proportional to 18,915.21, 26,101.96 and 10,415.71

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Solution

The fourth proportional to 18,915.21, 26,101.96 and 10,415.71 is: 14,373.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.21 : 26,101.96 = 10,415.71 : x
  2. Step 2: Convert to fraction form
    18,915.21/26,101.96 = 10,415.71/x
  3. Step 3: Cross multiply
    18,915.21x = 26,101.96 × 10,415.71
  4. Step 4: Simplify right side
    18,915.21x = 271,870,540.44
  5. Step 5: Solve for x
    x = 271,870,540.44/18,915.21
  6. Step 6: Final answer
    x = 14,373.12

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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.