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Finding the Fourth Proportional to 18,407.75, 25,401.09 and 10,450.31

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Solution

The fourth proportional to 18,407.75, 25,401.09 and 10,450.31 is: 14,420.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,407.75 : 25,401.09 = 10,450.31 : x
  2. Step 2: Convert to fraction form
    18,407.75/25,401.09 = 10,450.31/x
  3. Step 3: Cross multiply
    18,407.75x = 25,401.09 × 10,450.31
  4. Step 4: Simplify right side
    18,407.75x = 265,449,264.84
  5. Step 5: Solve for x
    x = 265,449,264.84/18,407.75
  6. Step 6: Final answer
    x = 14,420.52

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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.