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Finding the Fourth Proportional to 18,377.93, 25,361.54 and 10,420.15

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Solution

The fourth proportional to 18,377.93, 25,361.54 and 10,420.15 is: 14,379.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,377.93 : 25,361.54 = 10,420.15 : x
  2. Step 2: Convert to fraction form
    18,377.93/25,361.54 = 10,420.15/x
  3. Step 3: Cross multiply
    18,377.93x = 25,361.54 × 10,420.15
  4. Step 4: Simplify right side
    18,377.93x = 264,271,051.03
  5. Step 5: Solve for x
    x = 264,271,051.03/18,377.93
  6. Step 6: Final answer
    x = 14,379.81

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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.