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Finding the Fourth Proportional to 8,615.16, 12,928.41 and 3,685.77

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Solution

The fourth proportional to 8,615.16, 12,928.41 and 3,685.77 is: 5,531.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.16 : 12,928.41 = 3,685.77 : x
  2. Step 2: Convert to fraction form
    8,615.16/12,928.41 = 3,685.77/x
  3. Step 3: Cross multiply
    8,615.16x = 12,928.41 × 3,685.77
  4. Step 4: Simplify right side
    8,615.16x = 47,651,145.73
  5. Step 5: Solve for x
    x = 47,651,145.73/8,615.16
  6. Step 6: Final answer
    x = 5,531.08

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1.5x scale

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.