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Finding the Fourth Proportional to 9,815.38, 14,700.39 and 8,940.58

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Solution

The fourth proportional to 9,815.38, 14,700.39 and 8,940.58 is: 13,390.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,815.38 : 14,700.39 = 8,940.58 : x
  2. Step 2: Convert to fraction form
    9,815.38/14,700.39 = 8,940.58/x
  3. Step 3: Cross multiply
    9,815.38x = 14,700.39 × 8,940.58
  4. Step 4: Simplify right side
    9,815.38x = 131,430,012.83
  5. Step 5: Solve for x
    x = 131,430,012.83/9,815.38
  6. Step 6: Final answer
    x = 13,390.21

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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.