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Finding the Fourth Proportional to 18,252.81, 25,188.89 and 9,869.31

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Solution

The fourth proportional to 18,252.81, 25,188.89 and 9,869.31 is: 13,619.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,252.81 : 25,188.89 = 9,869.31 : x
  2. Step 2: Convert to fraction form
    18,252.81/25,188.89 = 9,869.31/x
  3. Step 3: Cross multiply
    18,252.81x = 25,188.89 × 9,869.31
  4. Step 4: Simplify right side
    18,252.81x = 248,596,914.62
  5. Step 5: Solve for x
    x = 248,596,914.62/18,252.81
  6. Step 6: Final answer
    x = 13,619.65

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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.