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Finding the Fourth Proportional to 18,367.78, 25,353.30 and 10,415.30

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Solution

The fourth proportional to 18,367.78, 25,353.30 and 10,415.30 is: 14,376.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,367.78 : 25,353.30 = 10,415.30 : x
  2. Step 2: Convert to fraction form
    18,367.78/25,353.30 = 10,415.30/x
  3. Step 3: Cross multiply
    18,367.78x = 25,353.30 × 10,415.30
  4. Step 4: Simplify right side
    18,367.78x = 264,062,280.39
  5. Step 5: Solve for x
    x = 264,062,280.39/18,367.78
  6. Step 6: Final answer
    x = 14,376.39

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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.