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Finding the Fourth Proportional to 18,438.58, 25,439.16 and 10,477.90

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Solution

The fourth proportional to 18,438.58, 25,439.16 and 10,477.90 is: 14,456.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.58 : 25,439.16 = 10,477.90 : x
  2. Step 2: Convert to fraction form
    18,438.58/25,439.16 = 10,477.90/x
  3. Step 3: Cross multiply
    18,438.58x = 25,439.16 × 10,477.90
  4. Step 4: Simplify right side
    18,438.58x = 266,548,974.56
  5. Step 5: Solve for x
    x = 266,548,974.56/18,438.58
  6. Step 6: Final answer
    x = 14,456.05

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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.