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Finding the Fourth Proportional to 8,660.19, 12,978.14 and 3,726.12

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Solution

The fourth proportional to 8,660.19, 12,978.14 and 3,726.12 is: 5,583.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.19 : 12,978.14 = 3,726.12 : x
  2. Step 2: Convert to fraction form
    8,660.19/12,978.14 = 3,726.12/x
  3. Step 3: Cross multiply
    8,660.19x = 12,978.14 × 3,726.12
  4. Step 4: Simplify right side
    8,660.19x = 48,358,088.39
  5. Step 5: Solve for x
    x = 48,358,088.39/8,660.19
  6. Step 6: Final answer
    x = 5,583.95

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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.