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Finding the Fourth Proportional to 18,402, 25,397.64 and 10,954.32

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Solution

The fourth proportional to 18,402, 25,397.64 and 10,954.32 is: 15,118.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,402 : 25,397.64 = 10,954.32 : x
  2. Step 2: Convert to fraction form
    18,402/25,397.64 = 10,954.32/x
  3. Step 3: Cross multiply
    18,402x = 25,397.64 × 10,954.32
  4. Step 4: Simplify right side
    18,402x = 278,213,875.80
  5. Step 5: Solve for x
    x = 278,213,875.80/18,402
  6. Step 6: Final answer
    x = 15,118.68

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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.