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Finding the Fourth Proportional to 18,516.58, 25,551.90 and 10,131.46

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Solution

The fourth proportional to 18,516.58, 25,551.90 and 10,131.46 is: 13,980.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,516.58 : 25,551.90 = 10,131.46 : x
  2. Step 2: Convert to fraction form
    18,516.58/25,551.90 = 10,131.46/x
  3. Step 3: Cross multiply
    18,516.58x = 25,551.90 × 10,131.46
  4. Step 4: Simplify right side
    18,516.58x = 258,878,052.77
  5. Step 5: Solve for x
    x = 258,878,052.77/18,516.58
  6. Step 6: Final answer
    x = 13,980.88

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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.