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Finding the Fourth Proportional to 8,415.40, 12,623.46 and 2,868.52

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Solution

The fourth proportional to 8,415.40, 12,623.46 and 2,868.52 is: 4,302.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.40 : 12,623.46 = 2,868.52 : x
  2. Step 2: Convert to fraction form
    8,415.40/12,623.46 = 2,868.52/x
  3. Step 3: Cross multiply
    8,415.40x = 12,623.46 × 2,868.52
  4. Step 4: Simplify right side
    8,415.40x = 36,210,647.48
  5. Step 5: Solve for x
    x = 36,210,647.48/8,415.40
  6. Step 6: Final answer
    x = 4,302.90

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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.