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Finding the Fourth Proportional to 18,285.59, 25,234.12 and 9,902.09

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Solution

The fourth proportional to 18,285.59, 25,234.12 and 9,902.09 is: 13,664.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,285.59 : 25,234.12 = 9,902.09 : x
  2. Step 2: Convert to fraction form
    18,285.59/25,234.12 = 9,902.09/x
  3. Step 3: Cross multiply
    18,285.59x = 25,234.12 × 9,902.09
  4. Step 4: Simplify right side
    18,285.59x = 249,870,477.80
  5. Step 5: Solve for x
    x = 249,870,477.80/18,285.59
  6. Step 6: Final answer
    x = 13,664.88

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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.