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Finding the Fourth Proportional to 9,113.88, 12,630.99 and 8,975.64

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Solution

The fourth proportional to 9,113.88, 12,630.99 and 8,975.64 is: 12,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,113.88 : 12,630.99 = 8,975.64 : x
  2. Step 2: Convert to fraction form
    9,113.88/12,630.99 = 8,975.64/x
  3. Step 3: Cross multiply
    9,113.88x = 12,630.99 × 8,975.64
  4. Step 4: Simplify right side
    9,113.88x = 113,371,219.08
  5. Step 5: Solve for x
    x = 113,371,219.08/9,113.88
  6. Step 6: Final answer
    x = 12,439.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.