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Finding the Fourth Proportional to 9,930.30, 14,895.45 and 8,634.30

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Solution

The fourth proportional to 9,930.30, 14,895.45 and 8,634.30 is: 12,951.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,930.30 : 14,895.45 = 8,634.30 : x
  2. Step 2: Convert to fraction form
    9,930.30/14,895.45 = 8,634.30/x
  3. Step 3: Cross multiply
    9,930.30x = 14,895.45 × 8,634.30
  4. Step 4: Simplify right side
    9,930.30x = 128,611,783.94
  5. Step 5: Solve for x
    x = 128,611,783.94/9,930.30
  6. Step 6: Final answer
    x = 12,951.45

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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.