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Finding the Fourth Proportional to 19,398.40, 29,054.40 and 16,806.40

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Solution

The fourth proportional to 19,398.40, 29,054.40 and 16,806.40 is: 25,172.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.40 : 29,054.40 = 16,806.40 : x
  2. Step 2: Convert to fraction form
    19,398.40/29,054.40 = 16,806.40/x
  3. Step 3: Cross multiply
    19,398.40x = 29,054.40 × 16,806.40
  4. Step 4: Simplify right side
    19,398.40x = 488,299,868.16
  5. Step 5: Solve for x
    x = 488,299,868.16/19,398.40
  6. Step 6: Final answer
    x = 25,172.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.