Home / 13,381.31-18,469.28-8,905.25

Finding the Fourth Proportional to 13,381.31, 18,469.28 and 8,905.25

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Solution

The fourth proportional to 13,381.31, 18,469.28 and 8,905.25 is: 12,291.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.31 : 18,469.28 = 8,905.25 : x
  2. Step 2: Convert to fraction form
    13,381.31/18,469.28 = 8,905.25/x
  3. Step 3: Cross multiply
    13,381.31x = 18,469.28 × 8,905.25
  4. Step 4: Simplify right side
    13,381.31x = 164,473,555.72
  5. Step 5: Solve for x
    x = 164,473,555.72/13,381.31
  6. Step 6: Final answer
    x = 12,291.29

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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.