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Finding the Fourth Proportional to 8,258.80, 12,390.12 and 2,415.52

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Solution

The fourth proportional to 8,258.80, 12,390.12 and 2,415.52 is: 3,623.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,258.80 : 12,390.12 = 2,415.52 : x
  2. Step 2: Convert to fraction form
    8,258.80/12,390.12 = 2,415.52/x
  3. Step 3: Cross multiply
    8,258.80x = 12,390.12 × 2,415.52
  4. Step 4: Simplify right side
    8,258.80x = 29,928,582.66
  5. Step 5: Solve for x
    x = 29,928,582.66/8,258.80
  6. Step 6: Final answer
    x = 3,623.84

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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.