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Finding the Fourth Proportional to 13,661.10, 18,853.02 and 8,354.25

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Solution

The fourth proportional to 13,661.10, 18,853.02 and 8,354.25 is: 11,529.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,661.10 : 18,853.02 = 8,354.25 : x
  2. Step 2: Convert to fraction form
    13,661.10/18,853.02 = 8,354.25/x
  3. Step 3: Cross multiply
    13,661.10x = 18,853.02 × 8,354.25
  4. Step 4: Simplify right side
    13,661.10x = 157,502,842.34
  5. Step 5: Solve for x
    x = 157,502,842.34/13,661.10
  6. Step 6: Final answer
    x = 11,529.29

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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.