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Finding the Fourth Proportional to 8,389.70, 12,579.02 and 4,692.32

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Solution

The fourth proportional to 8,389.70, 12,579.02 and 4,692.32 is: 7,035.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,389.70 : 12,579.02 = 4,692.32 : x
  2. Step 2: Convert to fraction form
    8,389.70/12,579.02 = 4,692.32/x
  3. Step 3: Cross multiply
    8,389.70x = 12,579.02 × 4,692.32
  4. Step 4: Simplify right side
    8,389.70x = 59,024,787.13
  5. Step 5: Solve for x
    x = 59,024,787.13/8,389.70
  6. Step 6: Final answer
    x = 7,035.39

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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.