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Finding the Fourth Proportional to 18,362.63, 25,348.17 and 12,402.36

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Solution

The fourth proportional to 18,362.63, 25,348.17 and 12,402.36 is: 17,120.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.63 : 25,348.17 = 12,402.36 : x
  2. Step 2: Convert to fraction form
    18,362.63/25,348.17 = 12,402.36/x
  3. Step 3: Cross multiply
    18,362.63x = 25,348.17 × 12,402.36
  4. Step 4: Simplify right side
    18,362.63x = 314,377,129.68
  5. Step 5: Solve for x
    x = 314,377,129.68/18,362.63
  6. Step 6: Final answer
    x = 17,120.49

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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.