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Finding the Fourth Proportional to 18,836.21, 25,994.10 and 10,878.41

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Solution

The fourth proportional to 18,836.21, 25,994.10 and 10,878.41 is: 15,012.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,836.21 : 25,994.10 = 10,878.41 : x
  2. Step 2: Convert to fraction form
    18,836.21/25,994.10 = 10,878.41/x
  3. Step 3: Cross multiply
    18,836.21x = 25,994.10 × 10,878.41
  4. Step 4: Simplify right side
    18,836.21x = 282,774,477.38
  5. Step 5: Solve for x
    x = 282,774,477.38/18,836.21
  6. Step 6: Final answer
    x = 15,012.28

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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.