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Finding the Fourth Proportional to 12,730.86, 17,568.36 and 7,141.86

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Solution

The fourth proportional to 12,730.86, 17,568.36 and 7,141.86 is: 9,855.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,730.86 : 17,568.36 = 7,141.86 : x
  2. Step 2: Convert to fraction form
    12,730.86/17,568.36 = 7,141.86/x
  3. Step 3: Cross multiply
    12,730.86x = 17,568.36 × 7,141.86
  4. Step 4: Simplify right side
    12,730.86x = 125,470,767.55
  5. Step 5: Solve for x
    x = 125,470,767.55/12,730.86
  6. Step 6: Final answer
    x = 9,855.64

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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.