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Finding the Fourth Proportional to 12,860.64, 17,730.65 and 9,272.61

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Solution

The fourth proportional to 12,860.64, 17,730.65 and 9,272.61 is: 12,783.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.64 : 17,730.65 = 9,272.61 : x
  2. Step 2: Convert to fraction form
    12,860.64/17,730.65 = 9,272.61/x
  3. Step 3: Cross multiply
    12,860.64x = 17,730.65 × 9,272.61
  4. Step 4: Simplify right side
    12,860.64x = 164,409,425.68
  5. Step 5: Solve for x
    x = 164,409,425.68/12,860.64
  6. Step 6: Final answer
    x = 12,783.92

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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.