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Finding the Fourth Proportional to 18,753, 25,900.40 and 12,774.30

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Solution

The fourth proportional to 18,753, 25,900.40 and 12,774.30 is: 17,643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753 : 25,900.40 = 12,774.30 : x
  2. Step 2: Convert to fraction form
    18,753/25,900.40 = 12,774.30/x
  3. Step 3: Cross multiply
    18,753x = 25,900.40 × 12,774.30
  4. Step 4: Simplify right side
    18,753x = 330,859,479.72
  5. Step 5: Solve for x
    x = 330,859,479.72/18,753
  6. Step 6: Final answer
    x = 17,643.02

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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.