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Finding the Fourth Proportional to 13,349.25, 18,421.97 and 8,381.25

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Solution

The fourth proportional to 13,349.25, 18,421.97 and 8,381.25 is: 11,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.25 : 18,421.97 = 8,381.25 : x
  2. Step 2: Convert to fraction form
    13,349.25/18,421.97 = 8,381.25/x
  3. Step 3: Cross multiply
    13,349.25x = 18,421.97 × 8,381.25
  4. Step 4: Simplify right side
    13,349.25x = 154,399,094.16
  5. Step 5: Solve for x
    x = 154,399,094.16/13,349.25
  6. Step 6: Final answer
    x = 11,566.13

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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.