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Finding the Fourth Proportional to 13,461.90, 18,577.26 and 7,872.90

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Solution

The fourth proportional to 13,461.90, 18,577.26 and 7,872.90 is: 10,864.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,461.90 : 18,577.26 = 7,872.90 : x
  2. Step 2: Convert to fraction form
    13,461.90/18,577.26 = 7,872.90/x
  3. Step 3: Cross multiply
    13,461.90x = 18,577.26 × 7,872.90
  4. Step 4: Simplify right side
    13,461.90x = 146,256,910.25
  5. Step 5: Solve for x
    x = 146,256,910.25/13,461.90
  6. Step 6: Final answer
    x = 10,864.51

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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.