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Finding the Fourth Proportional to 9,679.80, 14,487.30 and 8,513.40

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Solution

The fourth proportional to 9,679.80, 14,487.30 and 8,513.40 is: 12,741.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,679.80 : 14,487.30 = 8,513.40 : x
  2. Step 2: Convert to fraction form
    9,679.80/14,487.30 = 8,513.40/x
  3. Step 3: Cross multiply
    9,679.80x = 14,487.30 × 8,513.40
  4. Step 4: Simplify right side
    9,679.80x = 123,336,179.82
  5. Step 5: Solve for x
    x = 123,336,179.82/9,679.80
  6. Step 6: Final answer
    x = 12,741.60

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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.