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Finding the Fourth Proportional to 13,860, 20,792.75 and 7,088.51

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Solution

The fourth proportional to 13,860, 20,792.75 and 7,088.51 is: 10,634.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860 : 20,792.75 = 7,088.51 : x
  2. Step 2: Convert to fraction form
    13,860/20,792.75 = 7,088.51/x
  3. Step 3: Cross multiply
    13,860x = 20,792.75 × 7,088.51
  4. Step 4: Simplify right side
    13,860x = 147,389,476.90
  5. Step 5: Solve for x
    x = 147,389,476.90/13,860
  6. Step 6: Final answer
    x = 10,634.16

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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.