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Finding the Fourth Proportional to 12,806.28, 17,671.86 and 7,141.86

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Solution

The fourth proportional to 12,806.28, 17,671.86 and 7,141.86 is: 9,855.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,806.28 : 17,671.86 = 7,141.86 : x
  2. Step 2: Convert to fraction form
    12,806.28/17,671.86 = 7,141.86/x
  3. Step 3: Cross multiply
    12,806.28x = 17,671.86 × 7,141.86
  4. Step 4: Simplify right side
    12,806.28x = 126,209,950.06
  5. Step 5: Solve for x
    x = 126,209,950.06/12,806.28
  6. Step 6: Final answer
    x = 9,855.32

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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.