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Finding the Fourth Proportional to 18,860.68, 26,028.42 and 10,905.40

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Solution

The fourth proportional to 18,860.68, 26,028.42 and 10,905.40 is: 15,049.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.68 : 26,028.42 = 10,905.40 : x
  2. Step 2: Convert to fraction form
    18,860.68/26,028.42 = 10,905.40/x
  3. Step 3: Cross multiply
    18,860.68x = 26,028.42 × 10,905.40
  4. Step 4: Simplify right side
    18,860.68x = 283,850,331.47
  5. Step 5: Solve for x
    x = 283,850,331.47/18,860.68
  6. Step 6: Final answer
    x = 15,049.85

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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.