Home / 25,409.97-38,138.21-12,938.60

Finding the Fourth Proportional to 25,409.97, 38,138.21 and 12,938.60

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Solution

The fourth proportional to 25,409.97, 38,138.21 and 12,938.60 is: 19,419.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,409.97 : 38,138.21 = 12,938.60 : x
  2. Step 2: Convert to fraction form
    25,409.97/38,138.21 = 12,938.60/x
  3. Step 3: Cross multiply
    25,409.97x = 38,138.21 × 12,938.60
  4. Step 4: Simplify right side
    25,409.97x = 493,455,123.08
  5. Step 5: Solve for x
    x = 493,455,123.08/25,409.97
  6. Step 6: Final answer
    x = 19,419.74

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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.