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Finding the Fourth Proportional to 18,372.61, 25,361.93 and 12,412.31

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Solution

The fourth proportional to 18,372.61, 25,361.93 and 12,412.31 is: 17,134.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,372.61 : 25,361.93 = 12,412.31 : x
  2. Step 2: Convert to fraction form
    18,372.61/25,361.93 = 12,412.31/x
  3. Step 3: Cross multiply
    18,372.61x = 25,361.93 × 12,412.31
  4. Step 4: Simplify right side
    18,372.61x = 314,800,075.30
  5. Step 5: Solve for x
    x = 314,800,075.30/18,372.61
  6. Step 6: Final answer
    x = 17,134.21

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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.