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Finding the Fourth Proportional to 8,459.36, 12,679.80 and 2,907.44

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Solution

The fourth proportional to 8,459.36, 12,679.80 and 2,907.44 is: 4,357.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,459.36 : 12,679.80 = 2,907.44 : x
  2. Step 2: Convert to fraction form
    8,459.36/12,679.80 = 2,907.44/x
  3. Step 3: Cross multiply
    8,459.36x = 12,679.80 × 2,907.44
  4. Step 4: Simplify right side
    8,459.36x = 36,865,757.71
  5. Step 5: Solve for x
    x = 36,865,757.71/8,459.36
  6. Step 6: Final answer
    x = 4,357.98

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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.