Home / 25,409.42-38,137.55-12,938.43

Finding the Fourth Proportional to 25,409.42, 38,137.55 and 12,938.43

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Solution

The fourth proportional to 25,409.42, 38,137.55 and 12,938.43 is: 19,419.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,409.42 : 38,137.55 = 12,938.43 : x
  2. Step 2: Convert to fraction form
    25,409.42/38,137.55 = 12,938.43/x
  3. Step 3: Cross multiply
    25,409.42x = 38,137.55 × 12,938.43
  4. Step 4: Simplify right side
    25,409.42x = 493,439,956.35
  5. Step 5: Solve for x
    x = 493,439,956.35/25,409.42
  6. Step 6: Final answer
    x = 19,419.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.