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Finding the Fourth Proportional to 25,987.20, 38,905.20 and 19,442.40

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Solution

The fourth proportional to 25,987.20, 38,905.20 and 19,442.40 is: 29,107.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,987.20 : 38,905.20 = 19,442.40 : x
  2. Step 2: Convert to fraction form
    25,987.20/38,905.20 = 19,442.40/x
  3. Step 3: Cross multiply
    25,987.20x = 38,905.20 × 19,442.40
  4. Step 4: Simplify right side
    25,987.20x = 756,410,460.48
  5. Step 5: Solve for x
    x = 756,410,460.48/25,987.20
  6. Step 6: Final answer
    x = 29,107.04

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1.5x scale

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.