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Finding the Fourth Proportional to 18,954.78, 26,158.71 and 10,994.10

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Solution

The fourth proportional to 18,954.78, 26,158.71 and 10,994.10 is: 15,172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.78 : 26,158.71 = 10,994.10 : x
  2. Step 2: Convert to fraction form
    18,954.78/26,158.71 = 10,994.10/x
  3. Step 3: Cross multiply
    18,954.78x = 26,158.71 × 10,994.10
  4. Step 4: Simplify right side
    18,954.78x = 287,591,473.61
  5. Step 5: Solve for x
    x = 287,591,473.61/18,954.78
  6. Step 6: Final answer
    x = 15,172.50

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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.