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Finding the Fourth Proportional to 18,288.54, 25,238.16 and 9,905.04

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Solution

The fourth proportional to 18,288.54, 25,238.16 and 9,905.04 is: 13,668.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,288.54 : 25,238.16 = 9,905.04 : x
  2. Step 2: Convert to fraction form
    18,288.54/25,238.16 = 9,905.04/x
  3. Step 3: Cross multiply
    18,288.54x = 25,238.16 × 9,905.04
  4. Step 4: Simplify right side
    18,288.54x = 249,984,984.33
  5. Step 5: Solve for x
    x = 249,984,984.33/18,288.54
  6. Step 6: Final answer
    x = 13,668.94

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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.