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Finding the Fourth Proportional to 12,792.97, 17,655.59 and 7,128.64

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Solution

The fourth proportional to 12,792.97, 17,655.59 and 7,128.64 is: 9,838.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,792.97 : 17,655.59 = 7,128.64 : x
  2. Step 2: Convert to fraction form
    12,792.97/17,655.59 = 7,128.64/x
  3. Step 3: Cross multiply
    12,792.97x = 17,655.59 × 7,128.64
  4. Step 4: Simplify right side
    12,792.97x = 125,860,345.10
  5. Step 5: Solve for x
    x = 125,860,345.10/12,792.97
  6. Step 6: Final answer
    x = 9,838.24

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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.