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Finding the Fourth Proportional to 18,470.36, 27,661.30 and 13,459.30

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Solution

The fourth proportional to 18,470.36, 27,661.30 and 13,459.30 is: 20,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,470.36 : 27,661.30 = 13,459.30 : x
  2. Step 2: Convert to fraction form
    18,470.36/27,661.30 = 13,459.30/x
  3. Step 3: Cross multiply
    18,470.36x = 27,661.30 × 13,459.30
  4. Step 4: Simplify right side
    18,470.36x = 372,301,632.29
  5. Step 5: Solve for x
    x = 372,301,632.29/18,470.36
  6. Step 6: Final answer
    x = 20,156.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.