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Finding the Fourth Proportional to 18,445.62, 25,451.78 and 10,378.15

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Solution

The fourth proportional to 18,445.62, 25,451.78 and 10,378.15 is: 14,320.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,445.62 : 25,451.78 = 10,378.15 : x
  2. Step 2: Convert to fraction form
    18,445.62/25,451.78 = 10,378.15/x
  3. Step 3: Cross multiply
    18,445.62x = 25,451.78 × 10,378.15
  4. Step 4: Simplify right side
    18,445.62x = 264,142,418.25
  5. Step 5: Solve for x
    x = 264,142,418.25/18,445.62
  6. Step 6: Final answer
    x = 14,320.06

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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.