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Finding the Fourth Proportional to 18,166.50, 25,075.53 and 13,212.90

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Solution

The fourth proportional to 18,166.50, 25,075.53 and 13,212.90 is: 18,237.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,166.50 : 25,075.53 = 13,212.90 : x
  2. Step 2: Convert to fraction form
    18,166.50/25,075.53 = 13,212.90/x
  3. Step 3: Cross multiply
    18,166.50x = 25,075.53 × 13,212.90
  4. Step 4: Simplify right side
    18,166.50x = 331,320,470.34
  5. Step 5: Solve for x
    x = 331,320,470.34/18,166.50
  6. Step 6: Final answer
    x = 18,237.99

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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.