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Finding the Fourth Proportional to 18,390.67, 25,392.15 and 14,362.04

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Solution

The fourth proportional to 18,390.67, 25,392.15 and 14,362.04 is: 19,829.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,390.67 : 25,392.15 = 14,362.04 : x
  2. Step 2: Convert to fraction form
    18,390.67/25,392.15 = 14,362.04/x
  3. Step 3: Cross multiply
    18,390.67x = 25,392.15 × 14,362.04
  4. Step 4: Simplify right side
    18,390.67x = 364,683,137.47
  5. Step 5: Solve for x
    x = 364,683,137.47/18,390.67
  6. Step 6: Final answer
    x = 19,829.79

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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.