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Finding the Fourth Proportional to 18,815.56, 25,965.56 and 10,858.12

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Solution

The fourth proportional to 18,815.56, 25,965.56 and 10,858.12 is: 14,984.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.56 : 25,965.56 = 10,858.12 : x
  2. Step 2: Convert to fraction form
    18,815.56/25,965.56 = 10,858.12/x
  3. Step 3: Cross multiply
    18,815.56x = 25,965.56 × 10,858.12
  4. Step 4: Simplify right side
    18,815.56x = 281,937,166.35
  5. Step 5: Solve for x
    x = 281,937,166.35/18,815.56
  6. Step 6: Final answer
    x = 14,984.26

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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.